Well you could go as Kill Bill, kylie minogue, Japanese Kamikaze Pilot, A Kinght, Katy Perry, Kermit the frog, King of hearts card, Kong Fu Panda, Female Kris Kingle, Put a pillow up a shirt and say you got KNOCKED UP, maybe a Kitten or a Kite

Katniss everdeen from the hunger games

Koopa trouper from Mario

Donkey kong would that count

Ku klux Klan member - not really but I wonder if they've thought of that as a possibility. Koopa Troopa if you can find a way to pull that off.

http://fantendo.wikia.com/wiki/File:Koop...

I'm going to a dress up party where you have to dress up as something that starts with the letter K!

Please give me some ideas for a couples costume that starts with K but not kim and kanye west ;D haha someone is already doing that

If its too hard to think of any then help me with some single idea instead

Thanks so much :D