Three is the perfect number for iconic characters and matching looks.
Here are 15 trio Halloween costume ideas for you and your two best friends.
1. Powerpuff Girls

Pink, blue and green dresses with black belts.
Get the look:
- Colored mini dresses
- Black belts
- Pigtails
2. Charlie's Angels

Sleek 70s glam for three: flared pants, fitted bodysuits and big blowouts. Strike the iconic pose for photos.
Get the look:
- Flared pants
- Bodysuits
- Blowouts
3. Hocus Pocus Sisters

The Sanderson sisters are a fall classic.
Get the look:
- Velvet dresses
- Capes
- Witch wigs
4. Three Blind Mice

Easy and cute with ears and sunglasses.
Get the look:
- Black outfits
- Mouse ears
- Sunglasses
5. Pink Ladies

Matching pink satin jackets from Grease with black pants and neck scarves. Easy to find and instantly recognizable.
Get the look:
- Pink jackets
- Black pants
- Scarves
6. Rock Paper Scissors

A playful DIY trio in grey, white and silver with cardboard props. Cheap, clever and great for a party.
Get the look:
- Grey, white and silver outfits
- Props
7. The Chipettes

Matching colored sweaters and pleated skirts in pink, blue and purple with knee socks. Add letter initials for detail.
Get the look:
- Colored sweaters
- Skirts
- Knee socks
8. Three Musketeers

Tunics, capes, boots and feathered hats make a dramatic trio. Swords are optional but fun.
Get the look:
- Tunics
- Capes
- Hats
9. Cheetah Girls

Cheetah print tops, jeans and big hoops capture the early 2000s girl group. Bring the attitude.
Get the look:
- Cheetah tops
- Jeans
- Hoop earrings
10. Pop Star Trio

Matching sequin tops, mini skirts and toy microphones turn you into a girl group for the night.
Get the look:
- Sequin tops
- Mini skirts
- Mics
11. Sailor Moon Scouts

Colorful sailor uniforms with pleated skirts and bows. Each friend picks a different scout color.
Get the look:
- Sailor tops
- Pleated skirts
- Bows
12. Snow White, Rose Red & Cinderella

A storybook princess trio with three different gowns and tiaras. Great for a dressy party.
Get the look:
- Princess dresses
- Tiaras
- Heels
13. Fairy Trio

Matching tulle dresses and wings in three colors, plus lots of glitter. Simple to put together and pretty in photos.
Get the look:
- Tulle dresses
- Wings
- Glitter
14. Spice Girls Trio

Pick your three favorite Spice Girls: platform shoes, a Union Jack dress, a tracksuit. Instantly recognizable.
Get the look:
- Platform shoes
- Union jack dress
- Tracksuit
15. Thing 1, 2 and 3

Red tees, blue wigs and hand-drawn labels make the easiest recognizable trio costume.
Get the look:
- Red tees
- Blue wigs
- Labels drawn on
Agree on a budget early so everyone's costume matches in quality.
Pick a trio that's easy to recognize in photos.