Alien Dog Costume
Transform your four-legged friend into an adorable out-of-this-world space invader.
Alien dog costumes are a hilarious and adorable way to include your pet in Halloween festivities or sci-fi conventions. Whether you want a classic green Martian, a Toy Story squeeze toy alien, or a spooky Xenomorph, these outfits are guaranteed to turn heads. The look typically features bright green or metallic silver fabrics, extra eyes, antennae, and space-themed accessories.
- Difficulty
- Easy
- Time
- ~15 min
- Budget
- $15–40
Try it on
See yourself as Alien Dog
One clear photo of yourself; we render you in this costume — face untouched, full body, about 20 seconds.
One render, $1. No account needed — if it fails you're not charged. Pricing.
Your photo is sent to Google's Gemini API to make the render and isn't used for training. Renders are AI-generated and labelled.
Want a different costume on this photo, or a whole group in costume? Open the Try-On Studio.
What you need for a Alien Dog costume
Short on time? Buy it ready-made
Spirit Halloween sells the complete Alien Dog costume — one box instead of 4 pieces.
Green or Metallic Silver Dog Hoodie
A lightweight, comfortable dog hoodie or shirt in bright lime green or shiny metallic silver to serve as the base.
DIY: Use an old green or grey child's t-shirt and cut it to fit your dog's torso.
Antennae Headband
A soft, elastic headband featuring plush green alien antennae or silver springy boppers.
DIY: Attach green pipe cleaners and pom-poms to a soft elastic band that fits comfortably under your dog's chin.
Googly Eyes
Large, lightweight plastic or felt eyes to create a multi-eyed extraterrestrial look.
DIY: Cut three large circles out of white felt, draw black pupils with a marker, and fabric-glue them to the hood of the sweater.
Spaceship Collar or Skirt
A metallic silver fabric collar or ruff that mimics a flying saucer or space suit ring.
DIY: Cut a ring out of silver metallic poster board or soft foam and attach it to your dog's breakaway collar.
Rather not assemble it? See ready-made Alien Dog costumes at Spirit Halloween ↗
How to put it together
- 1
Choose a base hoodie or shirt that fits your dog comfortably without restricting their movement or breathing.
- 2
Attach the three felt or plastic googly eyes to the top of the hood using fabric-safe adhesive or light stitching.
- 3
Secure the antennae headband around your dog's head, ensuring the chin strap is snug but not tight.
- 4
Slip the metallic silver collar or skirt accessory over your dog's neck or waist.
- 5
Let your dog wear the costume for a few minutes indoors while offering treats to build positive association.
- 6
Adjust any loose pieces to ensure they do not block your dog's vision, hearing, or ability to walk.
Alien Dog for couples, groups, kids & more
- couples
- Dress up as an astronaut or NASA scientist while your dog plays the captured alien.
- group
- An entire Area 51 research team with multiple dogs dressed as different alien species.
- kids
- A child dressed as Buzz Lightyear or Woody alongside their Toy Story alien pup.
- Plus size
- Look for adjustable velcro-strap alien harnesses designed specifically for larger dog breeds.
Tips
- Prioritize your pet's comfort; if they dislike headbands, stick to a simple printed alien t-shirt.
- Never leave your dog unattended while they are wearing a costume to prevent chewing or snagging.
- Bring treats on your walk to reward your dog for keeping the costume on during quick photo ops.
- Ensure the costume doesn't block your dog's collar, harness, or leash attachment points.
Alien Dog costume FAQ
- How do I make a DIY alien dog costume?
- Use a green dog t-shirt as the base. Glue three large felt eyes onto the hood or back, and attach green pipe cleaners with pom-poms to a soft elastic band for the antennae.
- What is the best alien costume for large dogs?
- Look for step-in harness costumes or simple alien-themed capes and headbands, as full-body suits can be restrictive and hot for larger breeds.
- How can I get my dog used to wearing the costume?
- Introduce the costume pieces slowly days before Halloween. Let them sniff the outfit, reward them with treats, and have them wear it for short, positive increments.
Did you know? During the production of Alien (1979), filmmakers briefly considered putting a Whippet in a Xenomorph suit for certain scenes, but decided a puppet worked better because the dog looked too cute.