These 100+ Birthday Wishes for Your Sister Are Basically the Perfect IG Caption Ideas

Photo credit: Larry Washburn - Getty Images
Photo credit: Larry Washburn - Getty Images

No one understands you quite like a sister does. She's seen all of your ups and downs, from your unfortunate middle school haircuts to your biggest accomplishments. And yeah, she might have stolen your clothes once in a while (be honest, though, you also stole her makeup!) and snitched on you when you tried to sneak out, but you love her anyway. And what better way to say ILY than with these birthday wishes for your sister?

If you're the older sib, you probably can't believe your baby sister is all grown up. And if you're the younger sibling, you're probably making fun of her for being old but you know she's always gonna be your cool older sister. These birthday wishes make the perfect IG caption for any throwback picture from when you were kids, or one of you and her looking all grown-up and gorgeous. Or, if you wanna write something sweet in her birthday card, these should give you some inspo.

From funny birthday captions to sweet ones, these birthday wishes for your older or younger sister are perfect. Of course, if you realllly wanna be the best sister ever, you'll also grab her a thoughtful gift that she'll totally love. Remember, what goes around comes around...

Funny Birthday Wishes for Sister

  • Sisters are awesome, especially yours. Happy birthday!

  • Birthday candles aren’t the only thing getting lit this weekend, amirite? Happy birthday!

  • Happy birthday, sis! This year, your present is my presence.

  • Yeah, yeah, happy birthday. Where’s the cake?

  • Because it’s your birthday, I’ll share my fries with you.

  • I love you even though you snitched about that party I threw in high school. Happy birthday!

  • Let’s drink champagne and dance on the tables (well, until we’re politely asked to leave).

  • I know you’re a Cancer, but try not to cry while we’re singing happy birthday, okay?

  • Happy birthday to the responsible sister who said Mom’s gifts were from “both of us” when you really did all the work.

  • (For a 30th birthday) Happy birthday to someone who is officially 30, flirty, and thriving!

  • To quote the poet 50 Cent, “We gon’ party like it’s your birthday.”

  • May the BeReal notification happen during the most picture-perfect moment of your birthday.

  • Happy birthday to a dime who’s in her prime!

  • There is no one I’d rather blast Taylor Swift’s new album with. Happy birthday to my favorite Swiftie!

  • Remember to smile awkwardly as everyone sings “Happy Birthday” tonight!

  • I’m so glad I have someone who I can complain about our parents with. Happy birthday!

  • Happy birthday! Love, the only normal person in our family.

  • I love you more than I love binge-watching Netflix.

  • Happy birthday! May the hangover be mild tomorrow!

  • I’m smiling because we’re sisters, and I’m laughing because there’s nothing you can do about it.

  • Happy birthday! Your transformation into Mom is nearly complete.

  • Happy birthday, sis. Sorry for always stealing your clothes, but in my defense, you have good taste!

  • No one understands me like you, because no one else grew up with our weird family.

  • Happy birthday! Now that we’re officially old, there’s no way I’m staying at your party past 9.

  • Happy birthday! It’s officially time to start using a retinol.

  • My birthday wish for you is that you find a hottie at the bar tonight.

  • Cake 🎂✔️ Champagne 🍾✔️ Sister 👭🏾 ✔️

  • Fun fact: birthdays are good for you! Statistics show that the more you have, the longer you live.

  • I’m usually the star of the family, but I’ll let you have the spotlight for today.

    Sweet Birthday Wishes for Sister

    Photo credit: Klaus Vedfelt - Getty Images
    Photo credit: Klaus Vedfelt - Getty Images
  • Happy birthday to my favorite person in the whole wide world.

  • No one gets me like you do. Happy birthday, sis.

  • On this day, someone special joined the world, and I’m so lucky that she also joined my family.

  • I love you, sis. Happy birthday!

  • I’m so happy we got to grow up together. Happy birthday to my first best friend!

  • I hope your birthday is as magical and sweet as you are.

  • I wish for all your birthday wishes this year to come true.

  • Wishing you a year of happiness, joy, and lots of adventures!!

  • My birthday wish for you is that you get all the great things you deserve this year.

  • Happy birthday to someone who makes the world a brighter, kinder place.

  • Sending you so much love for your birthday.

  • I’m so happy you’re my sister. Happy birthday!

  • I hope you see yourself the way I see you: fabulous, kind, strong, smart, funny, and wonderful.

  • You’re one of a kind, and I love you so much. Happy birthday!

  • Happy birthday to someone who has a big heart.

  • I hope your [partner/boyfriend/girlfriend/etc.] is pampering you for your birthday since I can't be there. You deserve it!

  • We might not be together today, but I’ll be celebrating your birthday anyway!

  • Happy birthday to the world’s best sister.

  • You’ve grown so much in the past year, and I’m so proud of you. Happy birthday, sis.

  • I hope you know that you are very, very loved, today and every day.

  • You’re building such a meaningful life for yourself. Take time to enjoy it, especially today.

  • You have been so strong in the face of a tough year. Here’s to starting a brand new and brighter one.

  • Happy birthday to the sister who’s always there to pick me up when things get tough.

  • Sending you a birthday wish wrapped with all my love.

  • You don’t get to choose your family, but I would have chosen you. Happy birthday!

  • You live your life in a way that makes every day worth celebrating. Happy birthday, sis!

  • Your birthday is the first day in a new 365-day journey. I know you’ll make it a good one.

  • Hope your special day is filled with good food and good company!

  • Happy birthday to the sister who always has my back.

  • No one gets you like a sister, and I’m so glad you’re mine. Happy birthday!

  • This year, I wish for you to know how special and incredible you are.

  • Happy birthday to my globe-trotting sister! Wishing you many more adventures this year.

    Birthday Wishes for Older Sister

    Photo credit: Muslim Girl - Getty Images
    Photo credit: Muslim Girl - Getty Images

  • Happy birthday to someone who taught me everything I know about applying eyeliner.

  • You’re aging like a fine wine.

  • Happy birthday! You may be older, but I’ll always be wiser.

  • Happy birthday to a sister I’ve always looked up to.

  • Happy birthday! I couldn’t have asked for a better big sister.

  • Happy birthday, old lady!

  • Wishing you a birthday that’s fit for a queen.

  • I think you’re supposed to get finer and wise with age? That’s okay, there’s always next year.

  • Happy birthday to my favorite elder!

  • Happy birthday to the older sister all my friends had crushes on.

  • Because it’s your birthday, I’ll admit that you are actually cool.

  • You’re not getting older, you’re leveling up!

  • I’m so happy we’re growing old together, and that you have a head start.

  • I know you’re only 30, but according to TikTok, that makes you an old lady now.

  • Happy birthday, sis! Thanks for always picking me up and letting me stay on your couch when I had a fight with our parents.

  • Happy birthday to the sister who is forever young at heart.

  • Happy birthday to the sister who keeps me up to date on TikTok trends.

  • Happy birthday! You’re welcome for making you cool.

  • Who would have thought my annoying little sister would grow up to be so cool?

  • I might have been mad when Mom and Dad brought you home, but you’re actually alright.

  • Happy birthday to the sis who never told our parents about me sneaking out to parties. Love ya!

  • It’s time to finally start acting your age! (Just kidding).

  • Happy birthday to the little sis who was always willing to join in on my shenanigans!

  • Happy birthday! Sorry I took all the good genes before you got here.

  • Happy birthday to the best younger sister I could have asked for.

  • Happy birthday! I forgive you for being younger than me.

  • Enjoy being young now, because I’m telling you, the hangovers get worse the older you get.

  • Even though you roast me for being a millennial daily, I still hope you have a happy birthday.

  • Happy birthday! My gift is the fact that I literally taught you everything you know.

    Short Birthday Wishes for Sister

    Photo credit: Jutta Klee - Getty Images
    Photo credit: Jutta Klee - Getty Images
  • Happy birthday to my favorite (okay, only) sister!

  • Wishing you a birthday as fun as you are!

  • HBD to my sis.

  • Happy birthday to my forever partner-in-crime.

  • Happy birthday to my totally amazing sister.

  • Here’s to another trip around the sun. Happy birthday!

  • I can’t wait to celebrate you all day long!

  • 🎶 I don't know about you, but I'm feeling 22 🎶

  • It took 3️⃣5️⃣ years to look this damn good 🔥

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