Kids Alien Costume
An out-of-this-world space look that is easy to assemble.
The classic green alien is a timeless, fun choice for kids' Halloween costumes or school space days. This look combines a bright green base with metallic silver accents and signature antenna. It is highly customizable, comfortable to wear, and easy to put together at the last minute.
- Difficulty
- Easy
- Time
- ~20 min
- Budget
- $15–45
Try it on
See yourself as Kids Alien
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What you need for a Kids Alien costume
Short on time? Buy it ready-made
Spirit Halloween sells the complete Kids Alien costume — one box instead of 5 pieces.
Lime green hoodie
A bright lime green fleece hoodie to serve as the alien's body.
DIY: Use any plain green sweatshirt or long-sleeve t-shirt.
Metallic silver leggings
Shiny, metallic silver leggings or joggers to add a space-age look.
DIY: Use plain gray sweatpants or duct-tape silver stripes onto dark pants.
Alien antenna headband
A green or black headband featuring two silver springy boppers.
DIY: Wrap silver pipe cleaners around a plain headband and attach tinfoil balls to the ends.
Oversized black alien glasses
Large, oval-shaped black sunglasses that mimic classic alien eyes.
DIY: Cut large oval eye shapes from black felt and safety-pin them to the hood.
Silver metallic vest
A lightweight, shiny silver vest worn over the green hoodie.
DIY: Cut a simple collar or vest shape out of cardboard and wrap it entirely in aluminum foil.
Rather not assemble it? See ready-made Kids Alien costumes at Spirit Halloween ↗
How to put it together
- 1
Put on the bright lime green hoodie and the metallic silver leggings.
- 2
Layer the silver metallic vest or DIY foil collar over the green hoodie.
- 3
Place the alien antenna headband securely on the head, pulling the hoodie's hood up behind it if desired.
- 4
Put on the oversized black alien sunglasses to complete the extraterrestrial face.
- 5
Finish the look with silver, gray, or bright green sneakers.
Makeup & hair
Keep hair simple and tucked back under the headband or hood. If not using glasses, apply green face paint across the face with dark black circles around the eyes for a classic sci-fi look.
Kids Alien for couples, groups, kids & more
- couples
- Pair with an astronaut or a NASA scientist costume.
- group
- Dress a group as a whole family of aliens with a cardboard box UFO wagon.
- kids
- This guide is optimized for kids; use soft, tagless fabrics for sensory-friendly wear.
- Plus size
- Use an oversized green sweatshirt and stretchy silver leggings for a comfortable fit.
- pet
- A green dog sweater paired with a lightweight antenna headband.
Tips
- Ensure the alien glasses do not obstruct the child's peripheral vision, especially for trick-or-treating at night.
- Add glow-in-the-dark fabric paint or stickers to the costume to make the child highly visible in the dark.
- Layer warm thermal underwear beneath the green hoodie and pants if celebrating in cold weather.
Kids Alien costume FAQ
- How do I make a quick DIY kids alien costume?
- Use a bright green hoodie, tape two silver pipe cleaners with foil balls to the hood, and draw large black oval eyes on the hood with a fabric marker.
- What pants should my child wear with an alien top?
- Metallic silver leggings, shiny gray joggers, or matching lime green sweatpants work perfectly.
- Is this costume comfortable for school?
- Yes, using a soft cotton hoodie and leggings makes it comfortable for all-day wear, and the headband can be easily removed.
Did you know? The classic 'Little Green Men' depiction of aliens dates back to 1950s science fiction novels and media, cementing the bright green skin and antenna look in pop culture.