Where do you start when trying to come up with your Halloween costume? A quick dictionary or digital encyclopedia search will tell you to start with the letter "A". What a novel idea! Going from A to Z is certainly one method of ideating, so follow along as we share our favorite costume ideas, starting with the letter "A". We have an entire alphabet of costume ideas, but you might not need the other letters if you find your perfect Halloween costume here!
1. Alien Costume
Assimilate the universe with an awesome alien costume! Whether you dress up as a little green man or go all out with a futuristic space suit and alien antenna, this is a perfectly acceptable letter "A" costume idea.
2. Angel Costume
If you love wearing cute wings and pretty dresses, an angel costume might be perfect for you. There are many styles to choose from, from classic angels with wings and tinsel halos to celestial angels with stars or edgy fallen angels. Pick whatever suits you best!
3. Astronaut Costume
Take one giant leap for mankind with an astronaut costume! These adventurous letter "A" costumes are available in sizes for everyone, from men and women to children and infants. For people who love versatile Halloween costumes, an astronaut costume won't let you down!
4. Ariel Costume
There are quite a few Disney characters that start with "A", including a few of our favorite Disney Princesses! Princess Ariel is an excellent choice for any party, whether you're dressing as mermaid Ariel or villager Ariel. We love a girl with options.
5. Austin Powers Costume
Plus Size Austin Powers Costume
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Allow me to introduce...myself. Austin Powers is a fun movie character with a letter "A" name, perfect for your next shindig. If you really want to stand out, practice your 60s lingo and impress your fellow partygoers. Groovy, baby!
6. Aladdin Costume
Stay one jump ahead of the party in an Aladdin costume. This savvy street rat swept us off our feet in the 90s. Don't forget to bring your Princess Jasmine along!
7. Ash Ketchum Costume
Do you need a costume that resonates with anime fans and gamers? An Ash Ketchum costume is the perfect fit. Pikachu, I choose you!
8. Annabelle Costume
Halloween is the perfect time to break out your favorite horror movie costumes. Wear this Annabelle costume from The Conjuring franchise to conjure up some frights! It's the perfect opportunity to practice your scary doll makeup.
9. Ace Ventura Costume
Did you grow up thinking you could get a job as a pet detective? While it's not a real job that could provide a stable income, you can dress as Ace Ventura for Halloween. Alrighty then!
10. Aquaman Costume
If you love to wear superhero costumes, Aquaman is the perfect letter "A" costume idea for you! Sadly, even with a golden trident in hand, this Aquaman costume won't give you the power to communicate with marine life. But you will look super cool!
11. Army Costume
Who doesn't love a person in uniform? If you want to be an army man or woman for Halloween, there's quite a robust selection! You can find vintage-look costumes like this WW2 army soldier or more modern army looks. At ease!
12. Abby Cadabby Costume
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Parents of young children are probably familiar with the newer Sesame Street character, Abby Cadabby, introduced in 2006. This fairy-in-training loves to help kids learn about letters and counting. That's so magic!
13. Anna Costume
We don't think we're done with the Disney Princess costumes yet! Princess Anna from Frozen is a fun character who starts with "A." Expect to get stopped for pictures in this adorable Anna costume!
14. Ahsoka Tano Costume
With a franchise as large as Star Wars, you're practically guaranteed to find characters with names that start with every letter of the alphabet. While you might not easily find costumes for all of them, Ahsoka Tano is an excellent choice. Whether you loved her in The Clone Wars, Star Wars Rebels, The Mandalorian, The Book of Boba Fett, or her own series, she is one amazing Jedi!
15. Aphrodite Costume
Let your love for classical mythology shine with an Aphrodite costume! (Or Athena or Artemis, take your pick.) If given the opportunity to be a goddess for the day, would you take it?
16. Aurora Costume
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She is often referred to as "Sleeping Beauty" because of the title of her movie, but her name is Princess Aurora. Cursed at birth to die on her 16th birthday by the malevolent Maleficent, her fairy godmothers intervene and change the curse to make her enter a deep sleep. Thankfully, you can wear this costume without the threat of taking an enchanted nap.
17. Avocado Costume
Don't want the pressure of a recognizable character costume? Show up to the party in this easy avocado costume. Wear comfortable clothes and simply pop on your costume when you arrive. It's nice to have this kind of flexibility in a Halloween costume!
18. Amelia Earhart Costume
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While you could dress like any aviator, we love the famous pilot Amelia Earhart. (And you don't have to fly solo across the Atlantic to wear this historical costume!) Wear a pilot helmet with goggles, a brown jacket, and a scarf to complete the look.
19. Amelia Smollet Costume
Do you enjoy Disney's hidden gem movies? Flicks like Treasure Planet and Atlantis didn't perform as well as some of their mainstream Disney Princess movies, but they have since held onto a loyal following. Captain Amelia Smollet is a niche pick for a costume that starts with "A", but we wouldn't let that stop us!
20. Audrey Hepburn Costume
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It's hard to look classier than Hollywood star Audrey Hepburn. Suppose you want an easy DIY costume to pull out of your closet; find a long black dress and a pearl necklace to look like Audrey Hepburn in Breakfast at Tiffany's. Of course, you can find ready-made costumes for Holly Golightly, too!
21. Arthur Costume
If you're familiar with the PBS show Arthur, you know you're secretly getting double "A"s with this aardvark character. Arthur Read is an aardvark who loves to read. Having fun isn't hard when you've got a library card!
22. Arthur Pendragon Costume
How cool would it be to lead the Knights of the Round Table? If you love the myths and legends surrounding Arthur Pendragon, you'll love this King Arthur costume! Whether you're questing to find the Holy Grail or off to slay the dragon, you're ready to face anything as Arthur Pendragon.
23. Aang Costume
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Are you ready to be Avatar Aang of Avatar: The Last Airbender? (That's a whole lot of letter "A"s!) Hailed as one of the greatest cartoon TV series of all time, many of us dreamed of having our own elemental bending powers.
24. Abraham Lincoln Costume
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Have you ever been told you're tall enough to be Abraham Lincoln? Even if you're not tall, you'll be instantly recognized as the famous, honest Abe. All you need is a long black coat and a tall black hat, and you'll look like the American icon.
25. Alice Costume
Halloween is the perfect time to dress up and find a costume that makes you feel cute! One of our favorites is Alice in Wonderland, who has an adorable blue dress and a black bow in her hair. She's easily recognizable as is, but you can accessorize as much as you'd like with potion bottles, clocks, or even a white rabbit plush. (Bonus points if they're your purse!)
26. Alligator Costume
While any animal costume would do, we decided to pick an animal that starts with "A." Alligators are amazing creatures that make us think of dinosaurs. They're so cool and covered in scales, but don't get too close!
27. Anne Boleyn Costume
Let your history nerd flag fly in an Anne Boleyn costume. While she married one of the most infamous husbands in history, she had a fantastic wardrobe. You can tell everyone all about it while wearing this gorgeous Anne Boleyn costume!
28. Apple Costume
When asked to name something that starts with "A", how fast does an apple come to mind? They're a very common fruit; we often use apples to represent "A" in the alphabet. If you're tasked with finding a costume that starts with "A", a dependable apple costume won't disappoint you!
29. Ant Costume
Another letter "A" costume idea that comes to mind easily is an ant costume. Ants are typically tiny creatures, so imagine the surprise on everyone's face when you arrive as a giant ant! Someone call the exterminator!
30. Ant-Man Costume
Who's ready to play with quantum physics? Ant-Man uses a special suit made by Hank Pym to shrink and grow to various sizes. How would you use these powers?
31. Acrobat Costume
Acrobats perform amazing feats of strength and balance, usually as part of a circus or other entertainment endeavor. All you need is a glittery leotard and bold makeup so you shine brightly under the spotlight. Do you feel ready to be part of the greatest show on Earth?
32. Alice Angel Costume
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Alice Angel is a cartoon character in the video game Bendy and the Ink Machine. Designed to look like Fleischer studio cartoons, Alice is one of the three main characters at Joey Drew Studios, along with Bendy and Boris. Can you save the studio before it's too late?
33. Astrid Costume
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How much did you want to have your own dragon after watching How to Train Your Dragon? Dressing as Astrid may not make a dragon suddenly appear, but she has her own dragon, so it's nearly the same thing.
34. Astrid Deetz Costume
We guess cool girls run in the family. Astrid Deetz is the daughter of Lydia Deetz, who was the protagonist of the original Beetlejuice movie. In the sequel, Beetlejuice Beetlejuice, we're introduced to Lydia's daughter, Astrid. Will she learn to believe in ghosts?
35. Axolotl Costume
How many other animals can you think of that start with the letter "A"? Axolotls are a less common choice, but they're adorable with their pink bodies and frilly fins on their heads. If you want to be the perfect combination of cute and cozy, get this adorable axolotl costume for Halloween!
36. Armadillo Costume
Surprise your friends this Halloween with an armadillo costume! Out of all the letter "A" costumes, no one would expect you to find and wear an armadillo costume. How does it feel to be the most unique guest at the party?
37. Adam Costume
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Are you expecting a hot Halloween? An Adam costume is perfect for beating the heat. Ironically, you can also take along an apple as part of your costume, as it's the most famous depiction of the forbidden fruit.
38. Alfredo Linguini Costume
Adult Alfredo Linguini Costume
Have you ever wanted to be a great chef? You might have something in common with Alfredo Linguini! Granted, you won't get cooking advice from a culinary-inclined talking rat, but you can dream!
39. Anger Costume
Were you aware that you can dress as an emotion? Pixar's Inside Out characterized several common emotions, including Anger. While you can't comically blow your top, the flame does light up!
40. Applejack Costume
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Do you remember when pony fever swept 2010? That was the year that My Little Pony: Friendship is Magic debuted, along with the famous Mane Six. One of those six ponies was Applejack, known for her bravery and dedication to her friends. Was Applejack your favorite pony?
It seems that the letter "A" is quite popular! Did you find your next Halloween costume, or do you feel like your fortune can be found in another letter costume? Did we miss any of your favorite letter "A" Halloween costume ideas? Let us know in the comments! We're always on the lookout for more costumes.
