Keira Knightley
Keira Knightley covers Allure magazine Allure

Actress Keira Knightley covers the latest issue of Allure magazine, wearing only a Chanel jacket around her shoulders and unbuttoned Tom Ford tuxedo pants.

In her accompanying interview, the "Atonement" star discusses anorexia rumors. In 2007, Knightley lost weight unwillingly while shooting "Pirates of the Caribbean" trilogy, "At World's End."

"I had lost weight," she said in a 2007 interview with People magazine. "We were filming in searing temperatures and shooting fight scenes in which you were wearing a wetsuit underneath a load of corsets, fighting with heavy weights in the water."

Knightley added, "Can you imagine a more advanced cardio workout than that done hour after hour?"

In the December 2012 issue of Allure, she talks about how the rumors affected her.

"The anorexic stuff -- all of that -- it's always going to have an impact, so I think it did hit pretty hard," she said. "Because you go, 'Oh, maybe that's right!'

Knightley, who is engaged to James Righton, admitted that the scrutiny about her weight caused her to become self-conscious.

"Maybe my body is somehow not right," the actress wondered. "Or my face is not right. Or the way I speak is not right…when you're going through a period where you're really getting a lot of criticism, you go, 'Maybe all this is right! You just kind of want to hide it all.’”

Check out the rest of Keira Knightley's Allure shoot here.