Sister of the Groom Speech: What to Say at Your Brother's Wedding

Your brother is getting married and you're giving a speech, maybe because he asked, maybe because you couldn't let the day pass without saying something. A sister of the groom speech has two jobs nobody else in the room can do: show everyone the boy you grew up with, and welcome his bride as your new sister-in-law. Below you'll find a step-by-step plan for a wedding speech for your brother written from a sister's side, openers and toasts, a fill-in template, two sample speeches, and straight answers to the awkward questions, like what to say if you barely know the bride.

  • 2 full examples below
  • Free personalized preview
  • Unlock from $9.95, 30-day guarantee
When you speak
Rehearsal dinner or reception, wherever the couple adds you
Ideal length
2-4 minutes, about 300-500 words
Who you address
Your brother, your new sister-in-law, both families
Tone that works
Affectionate teasing, then one honest, proud moment

Write your sister of the groom speech in minutes

Answer a few questions about you and the people you're celebrating. Toastful writes a personal draft from your own stories. See a free preview before you decide.

Names &
roles
1/4
Select your role at the wedding

Free preview. Unlock the full speech only if you love it.

Sister of the groom speech examples

Each example below was written by Toastful from the answers shown under it, so you can see exactly how your own stories turn into a finished speech. Names and details are fictional.

Example 1: Heartfelt with a few laughs, big sister, about 4 minutes

573 words · about 4 min spoken

Good evening, everyone. For those who haven’t met me yet, I’m Adaeze, Chidi’s big sister. I’m four years older, which means for most of his childhood, I got to boss him around. It’s a job I took very seriously, and honestly, one I’m a little reluctant to give up.

Growing up, our mom worked night shifts at the hospital in Houston, so after school, it was my job to keep Chidi fed, out of trouble, and away from the microwave—usually in that order. He followed me everywhere. I made him play “school” with me, and since he was my only student, he got detention a lot. He never complained; he just wanted to know if detention came with snacks. Honestly, that sums up Chidi well: he’s patient, easygoing, and always looking for the bright side—or at least, the snack table.

One of my favorite memories is from when I was sixteen and my date canceled the day before prom. Chidi was twelve. He spent his whole allowance buying me a grocery store corsage and asked if he could be my date “so the dress doesn’t go to waste.” Mom drove us to Whataburger—me in my prom dress, Chidi in his best shirt—and we ate burgers in the car under the dome light. I think I peaked that night. Since then, every time something went wrong, Chidi managed to make it better, usually with a joke and, if I was lucky, fries.

Chidi’s always been gentle and quietly funny, the person everyone calls when something needs fixing or if you need to know which cousin’s birthday is next. He owns more tools than shoes, and I think he’s proud of that.

When I met Hannah, it was at our family Christmas. She hadn’t made jollof rice before, but she offered to help Mom and took notes the whole time on her phone. That impressed Mom, but what really got the family’s attention was when she beat Uncle Emeka at Scrabble after dinner. He’s been our family champion since… honestly, forever. Afterward, Mom pulled me aside and said, “This one is clever. Tell your brother not to be slow.” Chidi took the hint, thankfully.

Hannah, I grew up the only girl, and I’ve waited a long time for a sister. I couldn’t have asked for a better one. You keep Chidi on his toes, and I love how you two balance each other. You plan everything—right down to labeled spice jars—and Chidi brings calm and fun to all your plans. I’ve seen how he waits for you at the finish line, coffee in hand, after your Saturday 5Ks. That’s love, and that’s partnership.

I want to thank Karen and Doug for such a warm welcome dinner, and our aunties and uncles who came all the way from Lagos. It means the world to have everyone here. And I know our grandmother, Nne, is smiling down tonight—she always said Chidi would find someone strong enough to keep up with him. She would have adored you, Hannah.

My wish for you both is something I learned from our parents, who share the best part of their day with each other every night before bed. I hope you keep that habit, through all the ordinary and extraordinary days you’ll share.

(Raise your glass) To Chidi and Hannah—may your days be filled with laughter, good coffee, and the kind of love that’s always waiting at the finish line. Cheers!

What the writer told Toastful to get this speech
Speaker
Adaeze, sister of the groom
Relationship
I'm Chidi's big sister. I'm 33 and he's 29. Mom worked night shifts as a nurse in Houston, so after school I was in charge of him: homework, snacks and making sure he didn't set the microwave on fire. Now he lives in Austin and I'm in Dallas, but he still calls me before every big decision, including before and after he bought the ring.
Personality
Chidi is gentle and funny without trying to be. He owns more tools than shoes and fixes everything for everyone. He's also the only man I know who remembers every cousin's birthday without a reminder.
First impression
Hannah came to our family Christmas the first year they dated and offered to help Mom make jollof rice. She'd never made it, so she took careful notes on her phone the whole time. After dinner she beat Uncle Emeka at Scrabble, which nobody in the family had managed in years. Mom pulled me aside and said, "This one is clever. Tell your brother not to be slow."
Childhood
He followed me everywhere. I made him play school with me as the teacher, and he was my only student, so he got detention constantly. He never complained; he just asked if detention came with snacks.
Stories
When I was sixteen, my date canceled the day before prom. Chidi was twelve. He spent his whole allowance on a carnation corsage from the grocery store and asked if he could be my date "so the dress doesn't go to waste." Mom drove us to Whataburger in our formal clothes and we ate burgers in the car with the dome light on. It's still one of my favorite nights ever.
The couple
Hannah plans everything, right down to labeled spice jars, and Chidi is the calm one who makes the plans feel fun. They run a 5K every Saturday morning; he always finishes first, then waits at the finish line with her coffee.
Remembering
Our grandmother, Nne, passed away last year. She always told Chidi he would marry a woman who could keep up with him. She would have adored Hannah.
Thank-yous
Hannah's parents, Karen and Doug, for hosting such a warm welcome dinner, and our aunties and uncles who flew in from Lagos.
Wishes
Hannah, I grew up the only girl with a little brother, so I've waited a long time for a sister, and I'm so glad it's you. Welcome to the family. And my wish for you both comes from our parents, who share the best part of their day with each other every night before bed. Keep that habit.

Example 2: Short and funny, little sister (UK)

366 words · about 3 min spoken

Hello everyone, I’m Ellie, Ross’s little sister—the one who still gets a “home safe?” text from him after any night out, even though we live ten minutes apart in Glasgow. I’m here to embarrass him with just enough childhood stories to keep him humble in front of his new in-laws.

Let’s start with the infamous red Fiat. Ross drove me to sixth form every morning, and because the passenger door only opened from the outside, he had to get out and let me in like some sort of grumpy teenage chauffeur. He claims this was character-building. I think it was just an elaborate sibling power move.

Speaking of Ross’s unique approach to life, here’s a classic: When I was nine, he offered to teach me to ride a bike down the hill behind our house in Paisley. He demonstrated everything except how to stop. I went headfirst into Mrs Duncan’s hedge. Ross was so racked with guilt he gave me his entire Easter egg stash and carried my school bag for a month. That’s vintage Ross—competitive, a bit hopeless with instructions, but soft at heart.

Then Aisha arrived on the scene. I met her at my birthday drinks. Within ten minutes she’d beaten Ross at pool, mocked his shirt, and offered to drive everyone home. I texted Mum from the loos: “He’s punching.” If you know Aisha, you know I was right.

Now, as a couple, Aisha keeps Ross on time, and he keeps her fed. He’s even learned to cook her mum’s biryani, almost correctly. They only argue about the thermostat, which I hear is marriage at its healthiest.

Thank you to Aisha’s parents, Farah and Imran, for the incredible mehndi night, and to everyone who traveled from London to be here. Aisha, after years of being stuck with just Ross, I’m delighted to have a sister who can put him in his place with a pool cue.

Ross, let Aisha pick the music in the car. And both of you—never stop being the last ones on the dance floor.

(Raise your glass) To Aisha and Ross, may your lives be full of laughter, good food, and doors that always open from the inside. Cheers!

What the writer told Toastful to get this speech
Speaker
Ellie, sister of the groom
Relationship
Ross is three years older than me. He drove me to sixth form every morning in his ancient red Fiat, where the passenger door only opened from the outside, so he had to get out and let me in every day like a chauffeur. Now we live ten minutes apart in Glasgow and he still texts "home safe?" after every night out.
Personality
Ross reads the instructions after he's built the flat-pack wardrobe. He's competitive about everything, from pub quizzes to who makes the best roast potatoes, but he's secretly soft.
First impression
I met Aisha at my birthday drinks. Within ten minutes she'd beaten Ross at pool, told him his shirt was "brave" and offered to drive everyone home. I texted Mum from the loos: "He's punching."
Stories
This is the story I most want to tell. When I was nine, Ross taught me to ride a bike down the hill behind our house in Paisley and forgot to mention the brakes. I ended up headfirst in Mrs Duncan's hedge. He felt so guilty that he gave me his entire Easter egg stash and carried my school bag for a month.
The couple
Aisha keeps Ross on time and he keeps her fed. He's learned to cook her mum's biryani, almost right. They argue about the thermostat and nothing else.
Thank-yous
Aisha's mum and dad, Farah and Imran, for the most incredible mehndi night, and everyone who came up from London.
Wishes
Aisha, I grew up with only Ross for company, so I'm thrilled to finally have a sister, especially one who can beat him at pool. Ross, always let her pick the music in the car. And both of you, never stop being the last ones on the dance floor.

How to structure it

  1. 1

    Say who you are and which sister you are

    Start with your name and say if you're his big sister, little sister, twin or only sister. Many of the bride's guests have never met you. If you're also a bridesmaid or his best woman, say so in the same breath so people understand why you're holding the mic.

  2. 2

    Give the room a sister's view of him

    Sisters see a side of a man his friends never do: the brother who stole your hairdryer, waited up when you missed curfew, or let you paint his nails when he was six. Pick one detail like that and use it to show a trait he still has. It lets the room meet the boy before the groom.

  3. 3

    Tell one growing-up story that shows the man she married

    The best story for a sister of the groom speech is usually one where he looked out for you, or you looked out for him. It shows the bride what she's getting, which a purely embarrassing story can't do. Keep it to four or five sentences and land it on the trait it proves.

  4. 4

    Describe what changed when he met her

    Plenty of brothers tell their sisters things first: the call asking what to buy her for her birthday, the nervous text before she met your parents. One specific moment like that beats "I knew she was the one." If you introduced them, tell it in two sentences and hand the spotlight back.

  5. 5

    Welcome your new sister-in-law, directly and by name

    Turn to the bride and speak to her for a few lines. Tell her one thing you genuinely love about her and one thing you're looking forward to doing together. If you already have sisters, skip "I always wanted a sister" and say something true instead, like "I've got sisters, but none who can beat Dad at chess."

  6. 6

    Thank one person and remember anyone missing, briefly

    The hosts have usually done the big thank-you list, so add one only you would give, like your parents for raising you both. If a parent or grandparent has passed, you share that loss with the groom, which makes you a natural person to mention them; one gentle sentence near the end is enough. Tell your brother the exact words first so it doesn't catch him off guard mid-reception.

  7. 7

    Raise the toast to your brother and new sister

    Tell guests what to do: "Please raise your glasses." Then name them both, ideally as "my brother and my new sister." Stop there, because a clean last line is what people remember.

Opening and closing lines

Ways to open

  • “Hi everyone, I'm [Your Name], [Groom]'s big sister. I've been telling him what to do for [NUMBER] years, and tonight I finally have backup. Welcome, [Bride].”
  • “For [Bride]'s family who haven't met me yet, I'm [Your Name], the groom's little sister. I'm the reason he knows how to braid hair, and I'm not sorry.”
  • “I'm [Your Name], [Groom]'s sister. When he was six, I made him walk down the aisle in our living room at my doll's wedding. Today he did it for real, and he chose a much better partner.”
  • “Good evening, I'm [Groom]'s only sister. I grew up outnumbered by boys at the dinner table, so [Bride], thank you for finally evening the odds.”
  • “I'm [Your Name], [Groom]'s twin sister. We've shared a birthday, a bedroom wall and every cold for [NUMBER] years. This is the first big thing he's done without me, and I've never been happier to be left out.”
  • “For [NUMBER] years, I was the second most important woman in [Groom]'s life, right after Mom. Tonight I'm very happy to move down a spot.”
  • “I'm [Your Name], [Groom]'s sister. I was his first ever plus-one, at [Cousin]'s wedding in [YEAR], and he stepped on my feet all night. [Bride], I hope he's had lessons since.”
  • “When [Groom] decided to propose, I was the first person he called. Not to share the news, but to ask if the ring was too much. [Bride], I told him it was perfect, and I was right.”
  • “I'm [Your Name], [Groom]'s older sister. I taught him to tie his shoes, ride a bike and slow dance in the kitchen before his first school dance. [Bride], you're welcome.”
  • “[Groom] was my first best friend and my first business partner. At [AGE] we sold [lemonade] at the end of our driveway, and he gave half of it away to the neighbors. [Bride], that big heart is still there; just keep him away from the budget.”

Closing toasts

  • “[Bride], I spent my whole childhood asking Mom and Dad for a sister. It took a while, but [Groom] finally came through. To [Bride] and [Groom]!”
  • “[Groom], you grilled every boy who ever came to pick me up. I tried to grill [Bride] the first time we met, and somehow she ended up interviewing me. To the happy couple!”
  • “To my little brother, who used to hide behind my legs at birthday parties and today stood up in front of everyone to say "I do," and to my new sister, who makes him braver still. Cheers!”
  • “[Bride], if he ever insists he has never once been wrong, call me. I've been keeping records since [YEAR]. Please raise your glasses to [Groom] and [Bride]!”
  • “[Groom], I've been proud to be your sister my whole life, but never more than today. Everyone, please stand and raise a glass to the newlyweds.”
  • “Mom's one rule when we were kids was "Look after your brother." [Bride], from today we share that rule, and you get the bigger half. To [Bride] and [Groom]!”
  • “Here's to the boy who walked me to school every morning and the man who walked in here today. To [Groom] and [Bride]!”
  • “So here's to my brother, my new sister-in-law and a lifetime of loud family dinners with one extra chair at the table. Everyone, glasses up: to [Groom] and [Bride]!”
  • “[Grandma] always saved [Groom] the biggest slice of her [famous cake]. I know she'd have saved one for [Bride] tonight. For her, and for the two of you: to [Groom] and [Bride].”
  • “[Groom], you stuck up for me my whole childhood. [Bride], from today there are two of us sticking up for you. To [Bride] and [Groom]!”

Fill-in-the-blank template

Prefer to write it yourself? Copy this and replace everything in [brackets].

Hi everyone. For those I haven't met yet, I'm [YOUR NAME], [GROOM'S NAME]'s [BIG / LITTLE / TWIN / ONLY] sister. I've known him for [NUMBER] years, longer than almost anyone in this room, so I hope you'll let me say a few words about my brother.

Growing up, [GROOM'S NAME] was the kind of brother who [A HABIT FROM CHILDHOOD, E.G. STOLE THE LAST PANCAKE, WAITED UP FOR ME, READ MY DIARY]. One story I'll never forget is [A SHORT CHILDHOOD STORY IN 2-3 SENTENCES]. That's still him today: [THE TRAIT THAT STORY SHOWS].

As his sister, I've watched him [A WAY HE LOOKED OUT FOR YOU OR GREW UP, E.G. QUIZ EVERY BOY I DATED]. So when he met [BRIDE'S NAME], I noticed right away. He [A SPECIFIC CHANGE YOU SAW IN HIM]. The first time I met her, [YOUR FIRST IMPRESSION OF THE BRIDE].

[BRIDE'S NAME], I want to say this to you directly. [ONE THING YOU LOVE ABOUT HER]. You bring out [WHAT SHE BRINGS OUT IN HIM] in my brother. [I ALWAYS WANTED A SISTER / I ALREADY HAVE SISTERS, BUT NONE WHO CAN (SOMETHING SHE'S GREAT AT)], and I can't wait to [SOMETHING YOU'LL DO TOGETHER]. Welcome to the family.

[OPTIONAL: ONE LINE THANKING YOUR PARENTS, THE HOSTS OR GUESTS WHO TRAVELED FAR.]

[OPTIONAL: ONE GENTLE LINE FOR SOMEONE WHO ISN'T HERE, E.G. GRANDPA WOULD HAVE LOVED TODAY.]

[GROOM'S NAME], [ONE SENTENCE ON WHAT YOU ADMIRE ABOUT YOUR BROTHER]. I'm so proud to be your sister.

Everyone, please raise your glasses. To my brother and my new sister, [GROOM'S NAME] and [BRIDE'S NAME]!

Tips and mistakes to avoid

Do

  • Ask your brother where your speech fits (rehearsal dinner, reception, or before the best man), because a sister's toast isn't on most traditional programs.
  • Message the best man a week out and swap story lists: he has the friends and the bachelor or stag party, you have a whole childhood in the bedroom next to his.
  • If you're also one of the bride's bridesmaids, speak as his sister first, since the maid of honor will already be telling the room about her.
  • Make your welcome to the bride concrete by naming one thing you've already done together, like a coffee, a dress fitting or a family holiday, and one thing you'd like to do next.
  • If you knew the bride first or introduced them, tell it in two sentences; it's their love story, not yours.
  • If the bride already has sisters of her own, skip "the sister you never had" and simply say you're proud to join the line-up.
  • Bring your parents in with one line, like "Mom and Dad, you raised a good one," especially if neither of them is giving a toast.
  • Read it aloud to a timer; at a calm pace 400 words takes about 3 minutes, and a family toast rarely needs more.

Avoid

  • Don't make it a speech about the two of you; if most sentences start with "we," rewrite until he and his bride are the subject.
  • Don't mention past girlfriends or call her "the first one we actually liked"; as his sister you met the exes, and the bride doesn't need to hear about them.
  • Don't share the bride's secrets if you're friends with her too; save those inside jokes for the bachelorette or hen party.
  • Don't joke that you're "losing" your brother or that she'd "better treat him right"; it lands as a warning, not a welcome.
  • Don't tell the one childhood story he begged you to keep quiet; ask him beforehand what's off limits.
  • Don't say "welcome to the [Surname] family" or call her Mrs. [Surname] unless you know she's taking the name; "welcome to our family" works either way.
  • Don't repeat the full thank-you list the hosts already gave; one personal thank-you is plenty.

Frequently asked questions

How long should a sister of the groom speech be?

Aim for 2-4 minutes, which is about 300-500 words read at a calm pace. If the best man and maid of honor are also speaking, stay closer to 2-3 minutes so the evening keeps moving. At a rehearsal dinner with several family toasts, 2 minutes (around 250 words) is plenty. Nervous speakers usually talk at 120-140 words a minute, so time yourself reading it out loud, not in your head.

Does the sister of the groom give a speech?

Not traditionally, but it's common now. In the US, family toasts beyond the hosts, best man and maid of honor often happen at the rehearsal dinner. In the UK, Australia and much of the Commonwealth, the classic order is father of the bride, groom, then best man, so a sister's speech is an extra slot the couple adds. If you'd like to speak, it's fine to ask your brother where it would fit.

How do I write a speech for my brother's wedding?

Start by asking your brother three things: when you speak, how long you have and what's off limits. Then sort your memories into two piles: times he drove you mad, and times he looked out for you (or let you look out for him). Pick your main story from the second pile, because it tells his bride what she's getting. Add what you've noticed since he met her, a few lines spoken straight to her, and the toast.

What should I say to welcome my new sister-in-law?

Turn to her, use her name and be specific. Mention a moment that won you over, like the first family dinner she came to, and one thing she brings out in your brother. Then say something you're looking forward to doing together. Keep it about her, not a list of tips for handling your brother. If her parents or siblings are there, a quick "and welcome to all of [Bride]'s family" is a kind touch. Three or four sentences to her is enough.

What if I'm my brother's best woman?

Then you're giving the main speech, not a short family toast, so plan for 3-5 minutes. Lean on what only a sister knows, but add stories from his adult life too: school, first jobs, the friendships he's kept. In the UK the best man or best woman usually speaks last, after the groom; in the US you'd usually speak at the reception alongside the maid of honor. Ask the couple what other duties come with the role.

I introduced the couple. Should I tell that story?

Yes, briefly. Two or three sentences on how they met through you is charming; a full play-by-play makes it sound like the wedding is your achievement. Tell it, then turn it back to them: "I introduced them, but they did all the hard work." If the bride was your friend first, keep her private stories out of it and tell only what she'd happily hear repeated in front of her new in-laws.

What if I don't know the bride very well yet?

That's common, especially if you live far apart or they haven't been together long. Don't fake a close friendship the room may know isn't there. Talk about what you've seen in your brother since he met her: he's calmer, he plans ahead, he finally owns matching plates. Mention one real moment you've shared, even a single dinner, and ask your brother for one story about her. Ending with "I can't wait to get to know you better" is honest and warm.

How can Toastful help me write my sister of the groom speech?

Choose "Sister of the groom," add your brother's and his bride's names, then answer questions about growing up with him, your first impression of her and one or two childhood stories. Pick a tone and length, and Toastful writes a personal draft from your own memories in about a minute. You see a free preview of the opening first. Unlock the full speech for $9.95, one-time, with a print-ready PDF and cue cards, or $17.95 to add a 60-second toast and an alternate-tone version. There's a 30-day money-back guarantee.

Ready to write yours?

Share a few memories and get a personal wedding speech draft in about a minute. Free preview; unlock only if you love it.

Start my sister of the groom speech