Keira Knightley Fights Off Anorexia Talk with Tiny Fists. And a Lawsuit.

Keira Knightley is really thin.

But she's willing to go to court in order to prove she doesn't have an eating disorder. The actress is suing a British tabloid, saying it implied she lied about having an eating disorder.

At issue is a Jan. 11 story in the Daily Mail about a teenage girl who died of anorexia. It was illustrated with a shot of Knightley on a beach in a bikini.

The Pirates of the Caribbean actress, has "publicly denied suggestions that she might be anorexic or have a similar eating disorder," her lawyer, Simon Smith, said in a statement.

He said that any legal action will reiterate that denial. It might also include a Kate Bosworth photo in order to prove how much smaller actresses can get.

Knightley will "argue that the Mail's article suggests that she has dishonestly sought to mislead the public about whether she has anorexia or similar eating disorder and will show that she does not have anorexia."

Last summer, at the Pirates of the Caribbean: Dead Man's Chest London premiere, the girlfriend of Rupert Friend emphatically denied that she suffers from anorexia. "I don't have it. I'm very sure I don't have it," she said.

She added that it's not something to take lightly because members of her family have suffered from it. We do agree. And hope stars such as Mischa Barton have a sense of humor when we mock them for their weight.