25 great Halloween costume ideas for siblings
Jacob Lund/Shutterstock
These costumes go together like Mario and Luigi, Wednesday and Pugsley, or a rock, paper and scissors.
We independently select and share the products we love—and may receive a commission if you choose to buy.
Table of Contents
Halloween’s around the corner, and let’s face it, one cute costume is great, but two (or more)? That’s double-tap worthy. Welcome to the ultimate guide for sibling Halloween costumes! These aren’t just outfits; they’re memories in the making. Whether your kids are into video games or story book characters, we’ve got ideas that will make your Halloween Insta-famous. (Get ready for cuteness overload.)
How to choose a sibling Halloween costume
Picking the perfect sibling costumes isn’t just about what’s trending or what looks adorable—though let’s be real, that’s a big part of it. The secret sauce? It’s all about the kids’ personalities. Do they have a shared obsession with a cartoon series? Bingo! Are they polar opposites like night and day? Even better—think sun and moon costumes. The key is to find a theme that lets each child shine while still forming a unified, picture-perfect ensemble.
We’ve rounded up a collection of Halloween costumes for brothers and Halloween costumes for sisters which can, in many cases, be expanded on for larger crews! (Family Halloween costumes included!) So grab your little monsters, fire up the Pinterest board, and let’s get this Halloween costume party started. 🎃
The Brawny Guy and Mr. Clean
Two iconic strongmen, one funny sibling duo. White T-shirt and bald cap for Mr. Clean, flannel and a paper towel prop for Brawny—and boom, instant laughs.
Mario and Luigi
The ultimate brother act. Overalls, caps, and fake mustaches turn any pair of siblings into the most lovable plumbers in video game history.
Hot Dog and Ketchup
Because what’s a hot dog without its favorite sidekick? Silly, squishy, and snack-time approved, this pair is guaranteed to get giggles.
Harley Quinn and The Joker
There are lots of great villainous pairs to choose from, but between the face paint and colorful hair styles, Harley Quinn and Joker are always a lot of fun to execute.
Pirates
Eye patches, striped shirts, and a lot of “Arrr!” Perfect for siblings who love adventure (and candy treasure). Bonus points for a stuffed parrot.
Ellen and Clark W. Griswold (+ Cousin Eddie)
A nostalgic nod to National Lampoon’s Christmas Vacation. Sweaters, Santa hats, and a little over-the-top energy bring this sibling set to life.
Ice Cream Scooper and Ice Cream
One sibling serves, the other gets to be the sundae. Add sprinkles, whipped cream, or even a cherry headband, and you’ve got dessert on the move.
Real Life Hero Squad
From fire fighters and police to army soldiers career-themed costumes are great for Halloween and role play all year round.
Tooth and Toothbrush
If you’ve got a toddler with opinions and a baby who has no choice but to go along for the ride, hilarity is bound to ensue. A tooth and toothbrush are also semi-easy to whip up with felt and pool noodles. Win win!
Rock, Paper, Scissors
Get major creativity points for this clever group costume. Of course you can make a lot of it from poster board, but if craftiness isn’t your forte, don’t worry. We’ve got you.
A Very Hungry Caterpillar and Butterfly
It’s the sweetest transformation story in costume form. One sibling wiggles through Halloween as the colorful caterpillar, while the other spreads their wings as the butterfly. Storytime brought to life.
Dumb & Dumber
Pull out the tuxedos—orange and blue if you can swing it. Silly grins required. This sibling set is all about the goofy factor.
The Grinch and Cindy Lou Who
Green fur for one, a sweet nightgown and high hairdo for the other. This Christmas classic works surprisingly well for spooky season.
Cinderella and Prince Charming
For siblings who love fairy tales. One gets the gown and tiara, the other gets the royal jacket and crown. Simple, sweet, and timeless.
Wednesday and Pugsley Addams
Is there a better set of siblings to pay homage to on Halloween than Wednesday and Pugsley? We think not.
The Sanderson Sisters
They are sisters, after all! Sarah, Winifred and Mary Sanderson are a classic choice at this point. (We also love this option which each come with matching wigs!)
Wayne and Garth
Plaid shirt, ripped jeans, and some air guitar—done. It’s the 90s buddy duo we didn’t know we needed on trick-or-treat night.
The Queen and her Corgi
If you’re working with siblings of the furry variety, may we suggest this royal pairing? (It’s the wig that really does it for us.)
Cruella and her Pups
One sibling struts in black, white, and fur accents while the others go spotted. A group costume that’s equal parts chic and playful.
Pebbles and Bam Bam
A prehistoric pair that’s still adorable today. Bone hair clip, animal print, and tiny wooden “club” make it a Yabba Dabba Doo moment.
Ghostbusters and the Stay Puft Marshmallow Man
Proton packs for the heroes, squishy marshmallow suit for the sidekick. A throwback that works perfectly for a crowd.
Astronaut and Alien
A perfect pairing for space-loving siblings. One gets the sleek astronaut suit, the other gets to go wild with green face paint and antennae. Together, they’re ready for liftoff.
Garden Gnome and Mushroom
Whimsical and woodsy, this duo is pure storybook magic. A tall hat and beard for one, a red-and-white toadstool cap for the other, and suddenly you’ve got a garden scene come to life.
Bee Keeper and Bee
This one’s all buzz and no sting. The little beekeeper in a netted hat, the sibling buzzing around in stripes—sweetness overload. Bonus: add a tiny honey pot for props.
Sun and Moon
For siblings who are total opposites (but can’t live without each other). Shimmery gold for one, silver sparkle for the other—shine bright as the ultimate celestial set.
Train and Conductor
All aboard! One sibling drives the choo-choo, the other keeps everyone on schedule in a striped cap and bandana. It’s Halloween on the fast track to cuteness.
Related articles
