Adult Alien & Sci-fi Costumes

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Beam down to Earth and say "take me to your leader" in an alien costume that makes everyone believe in life on other planets! Our sci fi costumes have all the accessories you need to bring your looks to life, so whether you're going for a grey alien or something out of Alien vs. Predator, you can step out in the shoes of an otherworldly creature. Make your first contact with our alien costumes and see what planet you want to be from!
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Adult The Force Awakens Rey Deluxe Costume
Adult The Force Awakens Rey Deluxe Costume
You dueled the dark Kylo Ren and survived Jakku. Now, be Rey in this fabulous Star Wars Rey Deluxe Adult Costume! You'll likely meet various evil forces from Star Wars, and you'll be prepared to fight them all in this classic Rey disguise! This look is complete with a grey colored top with attached front and back wraps, pants with boot tops, 3D cuffs, 3D belt and arm warmers!
Adult Classic Star Wars Princess Leia Deluxe Costume
Adult Classic Star Wars Princess Leia Deluxe Costume
Join the Rebel Alliance and save the galaxy in this Star Wars Deluxe Princess Leia Costume Adult! Practice your Force techniques and master your Jedi skills so you can become the bravest woman warrior at your Halloween party or Cosplay event. Once you've perfected your lightsaber abilities, you'll need to make sure you look the part of an Imperial Senate member, which is why this ensemble comes with a Wig, Dress and the Princess of Alderaan's signature belt accessory. The dress resembles the floor length, white gown that fits Leia loosely, making it easier to fight off evil members of the Galactic Empire. Cinch your waist with the white belt adorned with silver accents in geometric shapes, and put on the wig made to look like the character's trademark cinnamon bun up do to complete your look. After you're all dressed up, grab your friends wearing other Rebel Alliance ensembles, like Luke Skywalker, Chewbacca, or Han Solo and you'll be guaranteed to win the best group costume contest a
Women's Star Wars Princess Leia Wig
Women's Star Wars Princess Leia Wig
A long time ago in a galaxy far, far away... Costumes.com started offering the Adult Star Wars Princess Leia Wig! So, if you are eager to transform into the galaxy's most formidable princess this Halloween, swap out the phrase, "Aren't you a little short for a stormtrooper?" for "Trick or treat!" during spooky season with this Star Wars Princess Leia wig. Featuring her signature side braids wrapped into buns, this wig captures the essence of Your Highnesses. You can join in on a couple’s costumes by asking your partner to dress up as Han Solo for even more excitement.
Adult Mandalorian Mandalorian Costume
Adult Mandalorian Mandalorian Costume
Head to the party wearing the Adult Beskar Armor Mandalorian Costume and you'll be the most protected guy in the room. Nothing can get through Beskar armor, it's just too powerful of a material. Whether your foes are wielding lightsabers or shooting blasters, you won't feel a thing while you're sporting this great wear. Featuring an armored jumpsuit with padded details, attached shoe covers, a black cape, gloves, and a Mandalorian mask, you're going to love this look.
Adult Classic Star Wars Jedi Robe
Adult Classic Star Wars Jedi Robe
What would a Jedi be without an awesome robe to show off his skill and rank? Not everyone had the right to wear these robes, but when you order the Men's Jedi Knight Robe you can fit right in with the highest ranking Jedi in the galaxy. You will look cool and confident while dealing with the bad guys in the only way they understand. Order now and prove how good of a warrior you are.
Robocop Adult Deluxe Costume
Robocop Adult Deluxe Costume
Take an action-packed trip back to the 80s in this RoboCop Adult Deluxe Costume! This padded jumpsuit with boot covers, foam headpiece and gloves will turn you into Detroit's favorite and finest cybernetic policeman. You are guaranteed to stand out in a crowd and bring the house down at any party when you show up in this throwback costume. This notorious rough and tumble get-up is also an amazing choice for any cosplay event or movie watch party!
Dune Paul Atreides Adult Costume
Dune Paul Atreides Adult Costume
Become the Messiah and great force of change in the universe this year when you get all dressed up in our Dune Paul Atreides Adult Costume. If you're a huge fan of the Dune movie series, then you're going to absolutely love sporting the look of your favorite warrior mystic this year. Paul is the Kwisatz Haderach, destined to change the fate of the universe. Although resistant to his own destiny, he is certainly an important character with a massive responsibility on his shoulders. You'll be bearing the responsibility of the Chosen One yourself when you're donning this classic sci-fi attire! With this fun Paul Atreides costume, you will receive everything you need to traverse the galaxy and visit new planets in style. Featuring a deluxe brown jumpsuit with printed armor pieces all over the body with attached shoe covers, as well as a pair of matching bracers, you're going to feel like a galactic traveler donning this one. Along with the jumpsuit, you will also receive a long gray flowing cloak that will have you ready to traverse the desert sands of any cosmic planet you visit. A look that is both stylish and comfortable, you can't go wrong with this intergalactic attire. Whether you're headed to a Dune convention or a Halloween party, you'll be a very welcome guest when you're sporting the attire of the one and only Muad'Dib. If you're looking to really make this a night to remember, then consider making it a Dune costume theme with all your friends. Just imagine the fun you'll have when you're traversing the galaxy with Chani, Duke Leto, Duncan, and all the other great cosmic characters right at your side. Pick up your Paul Atreides costume today, and go make this a night you never forget!
Adult Spaced Out Shirt, Leggings & Antennae Plus Costume
Adult Spaced Out Shirt, Leggings & Antennae Plus Costume
Head to the party wearing the Plus Spaced Out Womens Costume and you'll be making friends with the humans all night long. With this cute set, you will receive everything you need to become a beautiful and friendly alien who just wants to get along with the neighboring species. Featuring a bright green shirt with a black alien face print on the front, a matching antenna headband, and a silver pair of leggings, you're going to love this one.
Adult Classic Star Wars Boba Fett Costume
Adult Classic Star Wars Boba Fett Costume
Nobody is going to want to play against your team this year when you're sporting our Boba Fett Star Wars Hockey Jersey Set. With this set, you will receive everything you need to merge your love of athletics and Stars Wars into one galactic look. Featuring a light blue long sleeve hockey jersey with orange accents and a Boba Fett face logo on the chest, as well as a matching bounty hunter mask, you're going to love this awesome look this year.
Women's Dune Chani Costume with Mask
Women's Dune Chani Costume with Mask
If you're a huge sci-fi lover and a big fan of the Dune series, then you're going to love cruising through the desert in our Women's Dune Chani Costume with Mask this year. Become Paul Atreides partner, love interest, and mother to the future Emperor, all while donning this stunning Chani attire. Whether you're hunting down spice on the planet Arrakis or going on an adventure with the Muad'Dib, there is no telling what cosmic fun is in store for you while you're wearing this classic Dune look. Featuring a dark jumpsuit with matching boot covers, a long and draping brown mask that will blend right in with the sandy dunes of the desert, as well as a two piece mask to keep your face safe from sand and debris, you're going to be looking gorgeous and fierce at once in this killer wear. Pair with a wide variety of weapons, gear, and accessories from our site, and you'll feel right at home in Zendaya's desert princess aesthetic. Pick up your costume today, and go celebrate your favorite sci-fi hit in style!
Adult Stranger Things Will Wizard Costume
Adult Stranger Things Will Wizard Costume
The Demogorgon's won't stand a chance against you this year when you're sporting our Adult Stranger Things Will Wizard Costume. With this set, you will receive everything you need to brew potions and cast spells at all of the wicked extraterrestrial creatures from the Upside Down. Featuring a purple wizard robe with silver star designs, as well as a matching pointy wizard hat, you're not going to want to miss out on this classic Stranger Things look.
Adult Classic Star Wars Han Solo Costume
Adult Classic Star Wars Han Solo Costume
Head out to the planet of Hoth this year when you put on our Han Solo Hoth Mens Costume. With this set, you will receive everything you need to gear up for snow, ice, blizzards, and of course, dangerous creatures like the wampa! Featuring a deluxe quilted brown parka with a fur hood and functional jacket pockets, an attached badge, and a deluxe pair of white pants, you're going to love this Han Solo look this year.
Adult The Last Jedi Supreme Leader Deluxe Costume
Adult The Last Jedi Supreme Leader Deluxe Costume
You served as the Supreme Leader of the dark world, known as the First Order. You are a calculating humanoid capable of battling the Star Wars' forces of good. Now, bring the Supreme Leader Snoke to life for Halloween when you sport this Star Wars Episode VIII - The Last Jedi Deluxe Men's Supreme Leader Snoke Costume! You'll be disguised from head to toe in a detailed Snoke mask, gold-toned robe with attached white undershirt and belt. No Halloween party is complete without a classic Star Wars character? However dark and menacing! Shop our entire line of Star Wars disguises for Halloween!
Adult Steampunk Gentleman Costume
Adult Steampunk Gentleman Costume
Whether you're dressing up as a Steampunk airship pilot or a Steampunk journeyman with this awesome Steampunk Gentleman Costume for Men you'll have the best time of your life! With your purchase you will receive a black and brown faux leather trimmed jacket with a matching pair of pants. Buy yours today and then scan our site for the rest of your Steampunk gear and 2018 Halloween Costume Accessories.
Women's Men In Black 4 Agent M Costume Top
Women's Men In Black 4 Agent M Costume Top
Head to the party wearing the Women's Men In Black 4 Agent M Costume Top and watch how quickly all of the aliens and extraterrestrials clear the room. With this set, you will receive everything you need to become an elite FBI agent who has secret knowledge about a lot of highly classified information. Featuring an all black long sleeve MIB costume top with a printed Pawny and a pair of sunglasses, you're going to be looking too cool in this one.
Men's Silver Metallic Robot Costume
Men's Silver Metallic Robot Costume
Travel back from the future this Halloween. The Men's Robot Costume features a jumpsuit, helmet and belt. The jumpsuit is silver with metallic and black accents around the elbows, knees, waist and chest to give you that futuristic feel. The soft helmet is the same silver sheen fabric with mechanical looking eyes, a stationary mouth and an antenna. Grab a pair of our White Gloves with Snaps, sold separately on this website, and any semblance of your human form will disappear. This family friendly costume is great for showing off your robotic dance moves or trick-or-treating around the neighborhood. Be a blast in the past as this futuristic character because you'll be a party machine. Whether your intelligence is virtual or not, this Men's Robot Costume is the smart choice this Halloween.
Women's Steampunk Costume
Women's Steampunk Costume
Go crazy for Steampunk this Halloween when you put on the Madame Steampunk Costume for Women! Jump on a steam-powered airship a massive steamboat or a giant clockwork train and you'll be grooving in Steampunk style all night long. This gorgeous jacket and dress will have you feeling like a Victorian adventurer princess in no time. Buy yours today and then scan our site for more fun steampunk 2018 Halloween Costume Accessories and gear!
Adult Steampunk Costume
Adult Steampunk Costume
Step through the portal and emerge in our world as a citizen of steampunk! With those fancy mechanisms and steam powering up this costume's look it'll be hard to tell whether you're a technical genius or some kind of strange space traveler. Create your own story in this costume and look your best.
Adult Steampunk Jack Costume
Adult Steampunk Jack Costume
Head to the party wearing the Steampunk Jack Mens Costume and you'll have everybody asking to go on adventures for treasure with you all night long. With this set, you will receive everything you need to become a stylish young adventurer who is a master of steam-powered tech. Featuring a brown jacket with black accents, a black vest, and a white jabot, you're going to have a ball with this great Steampunk look this year.
Adult Stranger Things Alphabet Wall T-Shirt
Adult Stranger Things Alphabet Wall T-Shirt
Stranger Things is loved by everyone. From children to men this Adult Stranger Things Alphabet Wall T-Shirt will be welcome in any wardrobe. The strung up lights with alphabet letters is iconic in any group and if you want a low key Halloween costume this can easily be thrown on with anything.
Adult Neon Ex Machina Coat Costume
Adult Neon Ex Machina Coat Costume
Head to the party wearing the Neo Ex Machina Mens Coat and nobody will be messing with you this year. With this one, you will receive just the coat you need to become the master of the Matrix and a true guru when it comes to manipulating time and fighting foes. Featuring an all black faux leather coat with long sleeves, a collar, and front button closure, you are not going to want to miss out on this great look this year.
Women's Stranger Things Barbara Shirt
Women's Stranger Things Barbara Shirt
Step into the shoes of the most beloved minor character in Stranger Things in our Women's Stranger Things Barbara Shirt! You'll feel like the sassy best friend who always knows what's best for Nancy when you put on this authentic Stranger Things costume piece. Don't miss this opportunity to complete your Barb costume!
Women's Stranger Things Robin Scoops Ahoy Costume
Women's Stranger Things Robin Scoops Ahoy Costume
Head to the party wearing the Women's Stranger Things Robin Scoops Ahoy Costume and you'll have everybody quoting their favorite lines from Stranger Things. With this set, you will receive everything you need to scoop ice cream for all your best buds at your day job. Featuring a blue and white striped top with a printed vest design, as well as a matching Scoops Ahoy cap, you're going to love sporting this fun Stranger Things look this year.
Adult Classic Star Wars Jedi Costume
Adult Classic Star Wars Jedi Costume
No Sith Lord in all the galaxies above will be able to take you down this year when you're donning our Jedi Rhinestone T-Shirt for Women. With this look, you will receive just the gear you need to become a master Jedi who lives and breathes the Force. Featuring a brown and beige costume top with body print designs as well as a brown belt with dazzling rhinestone applications, you're going to have the time of your life wearing this one.
Men's Star Trek Scotty Shirt
Men's Star Trek Scotty Shirt
Beam down to the party wearing a costume that will let everyone know not to get too attached to you. Become the first line of defense for your captain and crew with the Star Trek Movie Red Shirt Adult a costume top that's come all the way from the Alpha Quadrant to make your Halloween out of this world.
Adult Space Empress Costume
Adult Space Empress Costume
Join the galaxy and get into character with the Space Empress Womens Costume. This well made outfit will hug your curves in all the right places and have everyone wanting to travel to space with you to get their own fashionable outfit. The galactic costume will have all the other characters ready to go to space wondering where you got your fashion sense from. It's comfortable to wear for many special occasions from comic con to a parry or costume event. The space empress can be the spotlight of the party as long as you get into character. Whether you want to be strict fun or highly energetic this costume will go with any behavior you choose to rock! Get this awesome galaxy like outfit to have all the aliens wanting to go shopping in outer space! You will be transformed into a new woman in minutes!
Adult Midnight Moon Maven Costume
Adult Midnight Moon Maven Costume
Head to the party wearing the Midnight Moon Maven Womens Costume and you'll be telling everyone the secrets of the stars. With this set, you will receive everything you need to become a gorgeous celestial princess who specializes in all things outer space. Featuring a beautiful blue dress adorned with silver star and moon designs, along with an attached matching cape, you're going to love wearing this amazing cosmic look this year with all your friends.
Adult Space Invader Alien Inflatable Costume
Adult Space Invader Alien Inflatable Costume
If you're looking for a costume that is fun, friendly, and out of this world, then the Space Alien Inflatable Adult Costume will surely fit the bill and align the stars. Head to the party sporting this funky extraterrestrial get-up and you'll be telling everyone all kinds of tales from your travels in the cosmos. Recount all your adventures from your home planet, invite your friends on your space cruiser, and make it an intergalactic night that none will soon forget. With this set, you will receive a giant inflatable alien costume featuring a green smiling cyclops alien face with antennae, a purple and gold extraterrestrial gown with a big star planted firmly at the center of a red belt, and two short arms with 3 green clawed fingers. No matter who you come across this year, you'll certainly be letting them know you "come in peace" with this friendly blue eye and great big alien smile across your face. Team up with your other space alien friends and roll out as an extraterrestrial squad to really bring this look home and explore the mysteries of the cosmos in style. Pick up your alien inflatable costume today, and go celebrate the universe and all its hidden treasures!
Adult Robot Female Costume
Adult Robot Female Costume
You'll be greasing up your joints and speaking in a foreign computer language to all of your friends this year when you put on our Womens Robot Costume. With this set, you will receive everything you need to become a gorgeous metallic robot who just wants to make friends with the humans. Featuring a silver metallic jumpsuit with black accents and a matching headpiece, you are not going to want to miss out on this one.
Adult Boy Robot Costume
Adult Boy Robot Costume
Contrary to popular belief robots don't just eat nuts and bolts. They love candy too! This Halloween go trick or treating with the Boys Teen Robot Costume on and you'll be able to eat all of the yummy candy in the world. Buy your costume today and go make this Halloween a robotic one!