Keira KnightleyKeira Knightley has backed up her denials of an eating disorder by revealing she knows all about the condition because she knows people who suffer from it.

After the Pirates of the Caribbean: Dead Man’s Chest premiere on Monday night, she said: “People said to me yesterday, ‘How does it feel to be anorexic?’ I had no idea that I was. I can safely say that I’m not.”

“I’ve got a lot of experience with anorexia. My grandmother and great-grandmother suffered from it. And I had a lot of friends at school who suffered from it. So I know that it’s not something to be taken lightly and I don’t. But I don’t have it, I am very sure of that.”

“In a way it’s good that it’s out there and people are talking about it.”

“It’s quite interesting because it’s normally high-achieving women who suffer from it because, I guess, they’re control freaks.”