Kiera Knightly Likes Being Naked... And Skinny

What's Kiera thinking? "I wanna take my clothes off." (AP Images)

Actress Kiera Knightly has no problem taking her clothes off for the camera. Knightly's boobs and tush have been seen on the cover of Vanity Fair, in Chanel ads and, now, on the cover of Interview magazine.

The "Pirates of the Carribean" star tells Ellen DeGeneres on her show today, "At the moment, my friends actually have bets going on that I can't actually do a photo shoot keeping my clothes on!

"I can't," the British star adds, who says she finds being in the buff "vaguely liberating... I hope I don't become a nudist."

When asked by Ellen if she's ever had an eating disorder, a question that's put Knightly on the front of many tabloids, the actress said, "I haven't. I think obviously warrants discussion. It's a psychological illness... It's very difficult when people start saying, 'Yes, OK, you're starving yourself. You're making yourself vomit or whatever.'" But Knightly says that she's just naturally a skinny-minnie. "My dad's the same and so's my mum."