13 Best Extraterrestrial Costume Ideas for Adults

Exploring extraterrestrial costume ideas can be an exciting venture, especially for those who are fans of sci-fi, aliens, and all things out of this world. Whether you're gearing up for Halloween, a themed party, or a cosplay event, these 13 creative and fun alien costume ideas will help you stand out.

1. Classic Green Alien

The classic green alien is a timeless choice. This costume typically includes green skin (achieved with body paint or a bodysuit), large black eyes, and an antenna headband. You can add a silver or metallic outfit to give it a more futuristic look.

2. Galactic Babe

For a more glamorous take, the Galactic Babe costume combines elements of sci-fi with fashion. Think metallic bodysuits, glittery makeup, and elaborate hairstyles. Accessories like space boots and futuristic jewelry can enhance the look.

3. Alien Abduction

This humorous costume gives the illusion that you're being abducted by an alien. It usually involves an inflatable suit that creates a scene of an alien carrying you away. It's a fun and eye-catching option that’s sure to get laughs.

4. Xenomorph from Alien

For a more terrifying approach, consider dressing as a Xenomorph from the Alien franchise. This costume is intricate and often involves a latex suit, detailed masks, and sometimes even mechanical elements to mimic the creature's movements.

5. Star Trek Alien

Embrace your inner Trekkie with a Star Trek alien costume. Options include Vulcans, Klingons, or even the blue-skinned Andorians. These costumes are great for fans of the series and can be easily recognized by fellow enthusiasts.

6. Mars Attacks! Alien

Inspired by the 1996 film *Mars Attacks!*, this costume features a large-brained alien with a menacing grin. The costume usually includes a mask, a space suit, and gloves. It's a quirky and nostalgic choice.

7. Sexy Space Empress

Combine allure with sci-fi by opting for a Sexy Space Empress costume. This outfit includes a sleek, shiny dress with futuristic elements like metallic accents, shoulder pads, and a unique headpiece. Perfect for those who want to make a bold statement.

8. DIY Cardboard Spaceship

For a creative and budget-friendly option, make a DIY cardboard spaceship costume. Use cardboard, paint, and some imagination to create a wearable spaceship. Pair it with an alien mask or makeup to complete the look.

9. Retro Martian

Go old-school with a retro Martian costume. Think 1950s sci-fi movies with lots of green, silver, and antennae. This costume can be both nostalgic and fun, bringing a vintage vibe to your extraterrestrial ensemble.

10. Alien Assassin

For a more intense and action-packed look, consider an Alien Assassin costume. This outfit often includes a dark, sleek suit, an alien mask, and accessories like toy weapons. It's perfect for those who want to look ready for an intergalactic battle.

11. Space Cadet

A Space Cadet costume is a simple yet effective choice. It usually involves a metallic skirt or pants, a matching top, and glittery makeup. Add some funky hairdos and accessories to make the look more eye-catching.

12. Inflatable Alien

Inflatable alien costumes are easy to wear and instantly recognizable. These costumes often feature a full-body inflatable suit that makes you look like a giant alien. They are comfortable and great for making a big impression at any event.

13. Futuristic Alien Family

If you're attending an event with family or friends, consider coordinating as a futuristic alien family. Use thrifted clothing, spray paint, and metallic accessories to create a cohesive and stylish group look. This idea allows for creativity and personalization.

Detailed Costume Descriptions

Classic Green Alien

Materials Needed:
  • Green bodysuit or body paint
  • Black eye makeup or large black eye masks
  • Antenna headband
  • Metallic clothing (optional)
How to Create:
  1. Body Paint/Bodysuit: Cover your body in green paint or wear a green bodysuit.
  2. Eyes: Use black eye makeup or wear a mask with large black eyes.
  3. Antenna: Attach an antenna headband to complete the classic alien look.
  4. Outfit: Add metallic clothing for a more futuristic appearance.

Galactic Babe

Materials Needed:
  • Metallic bodysuit
  • Glitter makeup
  • Space boots
  • Futuristic jewelry
How to Create:
  1. Bodysuit: Wear a shiny metallic bodysuit.
  2. Makeup: Apply glittery makeup to your face and body.
  3. Accessories: Add space boots and futuristic jewelry to enhance the look.
  4. Hair: Style your hair in an elaborate, space-inspired fashion.

Alien Abduction

Materials Needed:
  • Inflatable alien suit
  • Backpack
  • PVC pipes
How to Create:
  1. Inflatable Suit: Wear an inflatable suit that gives the illusion of being carried by an alien.
  2. Backpack: Attach a lightweight backpack to support the suit.
  3. PVC Pipes: Use PVC pipes to create the structure of the "flying" alien spacecraft.

Xenomorph from Alien

Materials Needed:
  • Latex suit
  • Detailed mask
  • Mechanical elements (optional)
How to Create:
  1. Suit: Wear a detailed latex suit that mimics the Xenomorph's body.
  2. Mask: Use a high-quality mask to replicate the creature's head.
  3. Mechanics: Add mechanical elements to enhance movement and realism.

Star Trek Alien

Materials Needed:
  • Star Trek uniform
  • Alien makeup or mask
  • Accessories (e.g., communicator badge)
How to Create:
  1. Uniform: Wear a Star Trek uniform relevant to your chosen alien species.
  2. Makeup/Mask: Apply alien makeup or wear a mask.
  3. Accessories: Add accessories like a communicator badge to complete the look.

Mars Attacks! Alien

Materials Needed:
  • Large-brained alien mask
  • Space suit
  • Gloves
How to Create:
  1. Mask: Wear a mask with a large brain and menacing grin.
  2. Suit: Put on a space suit that matches the movie's style.
  3. Gloves: Add gloves to complete the look.

Sexy Space Empress

Materials Needed:
  • Sleek, shiny dress
  • Metallic accents
  • Shoulder pads
  • Headpiece
How to Create:
  1. Dress: Wear a sleek, shiny dress with metallic accents.
  2. Pads: Add shoulder pads for a futuristic touch.
  3. Headpiece: Complete the look with a unique headpiece.

DIY Cardboard Spaceship

Materials Needed:
  • Cardboard
  • Paint
  • Alien mask or makeup
How to Create:
  1. Spaceship: Construct a wearable spaceship using cardboard and paint.
  2. Mask/Makeup: Pair the spaceship with an alien mask or makeup.

Retro Martian

Materials Needed:
  • Green clothing
  • Silver accessories
  • Antenna headband
How to Create:
  1. Clothing: Wear green clothing reminiscent of 1950s sci-fi movies.
  2. Accessories: Add silver accessories to enhance the retro look.
  3. Antenna: Complete the costume with an antenna headband.

Alien Assassin

Materials Needed:
  • Dark, sleek suit
  • Alien mask
  • Toy weapons
How to Create:
  1. Suit: Wear a dark, sleek suit that looks combat-ready.
  2. Mask: Use an alien mask to cover your face.
  3. Weapons: Add toy weapons to complete the assassin look.

Space Cadet

Materials Needed:
  • Metallic skirt or pants
  • Matching top
  • Glitter makeup
How to Create:
  1. Clothing: Wear a metallic skirt or pants with a matching top.
  2. Makeup: Apply glitter makeup to your face and body.
  3. Hair: Style your hair in a funky, space-inspired way.

Inflatable Alien

Materials Needed:
  • Full-body inflatable suit
How to Create:
  1. Suit: Wear a full-body inflatable suit that makes you look like a giant alien.

Futuristic Alien Family

Materials Needed:
  • Thrifted clothing
  • Spray paint
  • Metallic accessories
How to Create:
  1. Clothing: Use thrifted clothing and spray paint to create a cohesive look.
  2. Accessories: Add metallic accessories to enhance the futuristic theme.

Conclusion

Extraterrestrial costumes offer a wide range of creative possibilities, from classic green aliens to more elaborate and terrifying creatures. Whether you prefer DIY projects or ready-made costumes, these ideas will help you achieve an out-of-this-world look that’s sure to impress. Embrace your inner alien and have fun exploring these unique costume ideas!
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