32 Best Sibling Halloween Costumes That Are Too Cute Not to DIY
Make these fun ideas for your favorite brothers and sisters.
We've been independently researching and testing products for over 120 years. If you buy through our links, we may earn a commission. Learn more about our review process.
There are a ton of cute Halloween costumes for kids out there — from Disney to superheroes — but if you have a pair or trio (or more!) of brothers and sisters on your roster, there's nothing better than going with a fun sibling Halloween costume idea that shows off their bond.
To pull off iconic matching or synchronized outfits, look to our list which includes festive attire for babies and sweet toddler costumes as well as effortless tween and teen looks. And adult brothers and sisters don’t have to feel left out either. We even included some ideas that will work well for the entire family, if you decide to go that route. Each sibling costume here can be DIY'd because we know when you're shopping for a group of kids, homemade costumes are not only more fun, but usually, more affordable. Although, we did throw in a few you can buy.
Now, all that’s left for you to do is round up the gang and take your pick from the many (and we mean many!) outfits that you all can slay Halloween in.
Mario and Luigi
Look out, the Super Mario Bros. are on the way. Aside from jeans and long sleeve shirts that are probably already in their closet, add two pairs of white gloves, oversized hats and faux mustaches to complete this look.
Crayons
Whether they scribble or color inside the lines, they'll all be able to agree that this box of crayons is the most creative costume of the night. Use our stencil to easily DIY the hats.
Negroni
Who says the kids get to have all the fun? Adult siblings will love this twist on a classic cocktail. And all you need to pull it off is a pair of jeans, t-shirts and a stiff drink. Use our templates to get the perfect drink labels.
Minions
Minions are just the cutest! And this costume is especially on-trend thanks to the release of Minions 2: The Rise of Gru, and the upcoming Despicable Me 4. Some long-sleeve yellow shirts and a good pair of overalls is really all it takes, but add the minion-style goggles for extra fun.
Retro Music
Put the record on, hit the play button on the cassette player and dance under the disco ball. It's hard to beat this music-inspired DIY look that can be customized easily.
Martian and Astronaut
For looks that are out of this world, try out a martian and astronaut costume this Halloween. Not only can you DIY these getups to match your preference (a blue or purple martian maybe?), but you can also reuse pieces during any other time of the year.
Cans of Campbell's Tomato Soup
Just like hot soup warms you on a chilly day, these fun and colorful tomato soup costumes are sure to warm your heart. Siblings can choose which color they want to represent and purchase matching pastel wigs to go with it.
Witches
When in doubt, go for a good witch costume. Our friends at Country Living gave us the how-to on bringing these adorable looks to life. You can check out more witch-inspired outfits from them here.
How to make, per Country Living: "Cut two 31- by 20-inch rectangles from black-and-white gingham fabric. Sew ends together, leaving armholes toward the top of the rectangle. Fold in the top 1 inch of the fabric and sew a channel, leaving a 1-inch opening. Thread a ribbon or string through the channel. Once on, pull the ribbon to gather it at the top. Cut a 3 1/2- by 36-inch strip from black eyelet fabric. Sew a hand-running stitch along the edge of one of the long sides. Leave a knot at one end and pull the string on the other side to create gathers. Pin at the back of the costume or add a snap. Finish with witches hats."
Twin Emojis
Obviously a great idea if you're dealing with twins, but even if you're not, it doesn't get much easier than this matching costume. Grab black shirts and shirts, and complete it with bunny ears.
Star Trek
You can't go wrong with the classics, and this intergalactic trio will be adorable for any siblings to recreate. Don't forget to throw in a phaser to bring the costume together.
Mr. Bump and Little Miss
Bring back the nostalgia of the Mr. Men and Little Miss Series with these adorable looks. And you don't have to stop at a duo. For a group of three or four, add in Little Miss Sunshine and Mr. Happy.
Tin Man and Wicked Witch
They aren't your usual Wizard of Oz pairing, but they're just as adorable as Dorothy and Toto. DIY the tin man outfit using a gray sweatsuit and cardboard boxes, and pick up a traditional witch's hat and black dress to recreate this Wicked Witch look.
Robots
For the perfect last-minute dress up idea, robots are a winning pick. You can use old cardboard boxes and wrapping paper to create the heads and decorate them as you like.
Polar Bears
We're sure they'll be the sweetest polar bears you've ever seen. Just dress your babies in white hooded onesies with bear ears for costumes that will warm even the coldest of nights. You can also just use white outfits you have and DIY little ears.
Scuba Divers
For siblings who can't seem to stay out of the water, these scuba diver outfits are a natural fit. Pair black morph suits with swim goggles and create diving cylinders out of liter soda bottles.
Bumble Bee and Lady Bug
Your little bumblebee and ladybug will be the talk of the party. For a really simple DIY, dress them in comfy clothing (black and red shirts), and create bee stripes with yellow tape and ladybug spots with black circles.
Monsters, Inc.
The whole gang is here thanks to this adorable costume idea. The best part of these outfits is that they are super comfy and super warm, making them perfect for Halloween night.
Spiderman and Wonder Woman
The best thing about superhero costumes is that there are so many to choose from — and they help your little ones feel so strong and mighty. (Seriously, they may never take these outfits off.)
Starbucks Barista and Drink
In our opinion, a frappucino outfit is one of the cutest baby Halloween costumes of all time. A sibling in a barista apron completes this adorable duo.
Mario and Princess Peach
If the kids can't play enough Mario Party, dress them up as the game's main characters. It's a clever costume that kids and adults alike will find sweet and hilarious.
Get the tutorial at See Vanessa Craft »
TRENDING NOW: 35 Unique Toddle Halloween Costume Ideas That Are Too Stinkin' Cute
Juliana is a writer, editor and SEO strategist with over six years' of experience on the editorial staffs of publications including Reader's Digest, Best Life and Good Housekeeping. She covers everything from holiday and home to travel and food, and lives in New York City, where she can often be found at hot yoga or raiding the candy aisle at CVS.
Cameron (she/her) is a staff writer for Good Housekeeping, where she covers everything from holidays to food. She is a graduate of Syracuse University, where she received a B.A. in magazine journalism. In her spare-time she can be found scrolling TikTok for the latest cleaning hacks and restaurant openings, binge-watching seasons of Project Runway or online shopping.
Win All the Awards With These Pop Culture Costumes
Creative Halloween Costume Ideas for Kids
80 Unique Group Halloween Costume Ideas
The Best Couples Halloween Costumes of 2025
