Josh Hartnett suffered for his art in new vampire movie 30 Days Of Night when he was forced to don a disgusting yak hair beard. The star didn't have time to grow a proper beard for the horror drama and spent weeks convinced his facial hair was all human.

He says, "They made the beard out of yak hair because it's curly, I guess... but they wouldn't tell me that. They told me it was made out of human hair, from some Eastern European prostitute's hair.

"It was the worst because... it would fall out and, if you were eating, you'd get little pieces of yak hair in your food. It's like yak DNA and no one tells you where the yak hair comes from on the yak."

-Josh Hartnett Pictures

(This news article provided by World Entertainment News Network)