This is a gallery for Princess Celestia's different physical appearances, forms, and outfits in the series, films, IDW comics, and other official material.
Appearances
Alicorn pony, Princess Twilight Sparkle - Part 1
Alternate forms
Unicorn pony, The Return of Harmony Part 1
No cutie mark, Twilight's Kingdom - Part 2
Crystal Alicorn, The Crystalling - Part 2
Daybreaker, A Royal Problem
Half-pony form, My Little Pony Equestria Girls merchandise
Draped in fire, My Little Pony: Friendship is Magic Issue #20
Turned to stone, My Little Pony: Friendship is Magic Issue #35
Pegasus pony, My Little Pony: Friendship is Magic Issue #50
Pegasus pony, My Little Pony: Friendship is Magic Issue #65
All-pink mane and tail, My Little Pony: Legends of Magic Issue #1
Alternate world counterpart, Nightmare Star, Enterplay collectible card game
Outfits
Princess coronation outfit, Magical Mystery Cure
Grand Galloping Gala outfit, Make New Friends but Keep Discord
Alternate timeline counterpart, clown costume, The Cutie Re-Mark - Part 2
Human counterpart, Camp Everfree outfit, My Little Pony Equestria Girls: Legend of Everfree
Battle armor, My Little Pony: Friendship is Magic Issue #4
Bridesmaid outfit, My Little Pony: Friendship is Magic Issue #9
Secret Service outfit, My Little Pony: Friendship is Magic Issue #10
Superhero costume, My Little Pony: Friendship is Magic Issue #16
Samba dress, My Little Pony: Friendship is Magic Issue #19
Morning robe, My Little Pony Micro-Series Issue #10
"Ms. Celestia", My Little Pony: Friends Forever Issue #20
Miscellaneous
Depicted in statue, A Friend in Deed
Human counterpart, My Little Pony Equestria Girls: Rainbow Rocks
Alternate universe counterpart (evil), My Little Pony: Friendship is Magic Issue #18
Alternate universe counterpart (good), My Little Pony: Friendship is Magic Issue #20
Cutie marks
Crescent moon on a dark purple background (switched with Princess Luna in S7E10)
Stylized sun with black center (alternate universe counterpart in My Little Pony: Friendship is Magic Issue #20)
Light bulb (as a Pegasus in My Little Pony: Friendship is Magic Issue #50)