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18 Best 'Little Mermaid' Halloween Costume Ideas for the Whole Family
Including DIY outfits for Ursula and Ariel.
When it comes to fun Halloween costumes, Disney characters are always a great source of inspiration. There are those classic heroes, villains and, of course, the storybook princes and princesses that we all grew up with that everyone is happy to see year after year. And with the recent release of the live-action movie starring Halle Bailey, it makes sense that interest in the best The Little Mermaid Halloween costumes for all ages is at an all-time high right now. So join us under-the-sea to explore homemade getups and ones you can easily buy to complete your ultimate Halloween look, whether you're going solo, looking for a great kids' costume or need a look the whole family can get in on.
We have amazing mermaid-inspired costumes to channel Ariel, as well ideas to help anyone dress up like Ursula (a.k.a the most fabulous sea witch of all). Plus, there are options for men (or anyone!) who want to channel Prince Eric, Sebastian and Flounder. You'll find looks inspired by the original movie from 1989, as well as movie-styled costumes. Plus, we included all the accessories you need to make any Little Mermaid costume come to life.
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DIY Tween Ariel Land Costume
You may need some basic sewing skills to put together this satin skirt and vest look, but the results will be fit for a princess. And make sure to incorporate accessories like a large blue bow and flounder plush for the perfect under the sea moment.
How adorable — and more importantly, easy — is this dress that includes a metallic green scaled skirt? It also comes with a bow that features the same pattern for ultimate Ariel vibes.
Adult DIY Ariel Costume
Ditch the skirt this year and opt for metallic scale-printed pants like you see here. You can easily attach purple seashells to any top you have, or you can go the movie way, and skip the seashell bra altogether. Finish the look with a stuffed Flounder.
Ariel is royalty after all, and this costume perfectly embodies her regal nature with a scepter and tiara. It also includes the perfect mermaid skirt and a red wig, taking after the animated version of the film.
Who could forget seeing Halle step on screen in that ruffly blue dress? This look for kids is almost identical, and it even comes with the pink headband.
You can't pass up the opportunity to dress up your baby in this adorable plush Flounder costume. It includes a full bodysuit with snaps and a hood. It also comes in sizes 0–18 months. Shop the adult version here.
Adult DIY Ursula Costume
Everyone's favorite sea witch's iconic style doesn't take much to pull off: pair a black tube top with a pair of leggings, and then twist together black and purple tulle to create her tentacles.
Adult DIY Ariel Land Costume
![los angeles, ca october 28 cosplayer vivian trie as ariel from the little mermaid participates in the opening night of cosplay in america exhibition held at the icon on october 28, 2011 in los angeles, california photo by albert l ortegagetty images](https://hips.hearstapps.com/hmg-prod/images/gettyimages-130736068-64ac50c845902.jpg?crop=1.00xw:0.926xh;0,0.0263xh&resize=980:* "Opening Night Of "Cosplay In America" Exhibition")
In the animated version of the film, Ariel created a dress out of tattered fabric and rope when she first gained her legs. DIY your own version of this look with a bedsheet and gold belt. Don't forget to come through your hair with a fork as you make your way through the Halloween party.
Not exactly like the one Halle wore, but pretty close (and just as romantic). It also comes in plus-sizes. If your size is sold out, you can try this similar version from Amazon.
From the official Disney shop, this beautiful costume features opening at the back and a discreet flap in the front, not to mention all the pretty sequins!
Channel the evil sea witch with this adult version of her getup. Instead of tentacles, this outfit features a ruffled skirt. It comes in sizes small to 4X.
Every voice stealing sea witch needs her crown and seashell necklace. This accessory kit, which includes a foam crown headband and velvet collar cape, is just the thing to complete your look.
Okay, it's not as regal as the Queen in the movie, but it's close. You can channel Eric's mom even more if you play up the dress with a lot of jewelry.
With this accessory kit, you'll be fit to rule the sea. It comes complete with a bearded mask, foam crown and wrist cuffs.
Styled after the live-action movie, your little one will be anything but crabby in this getup. It comes in sizes 6 months-4T.
He's King Triton's right hand and advisor, but he mostly looks after Ariel. Channel everyone's favorite crab with this effortless jumpsuit. The costume also includes a headpiece and mitts. Shop the kid version here.
Make your little one's dreams of dressing as Ursula come true with this octopus-inspired gown. It comes in sizes 3T- 14 years old, and features glitter tentacles.
With this addition, you've got the perfect couples costume in the making. For guys who don't love to dress up, it's festive without being too over-the-top.
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.
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