Keira Knightley, the British actress currently starring in JOE WRIGHT's big-screen adaptation of Tolstoy's Anna Karenina, admits she almost convinced herself that she was anorexic after a media storm over her weight. Knightley spoke in-depth about the matter during an interview with Allure magazine, which she also covers for November.

Despite regularly finding herself in the 'most beautiful' lists, the Oscar-nominated actress admits she isn't entirely comfortable with her body and admitted that rumors concerning her thin figure hit her "pretty hard," saying, "Because you go, oh, maybe that's right! I knew I wasn't anorexic, but maybe my body is somehow not right," she said. "When you're going through a period where you're really getting a lot of criticism, you go, maybe all this is right!" After becoming tabloid fodder for years, Knightley is notoriously private about her relationships these days. She's currently engaged to the Klaxons keyboardist James Righton though insists she's a little stuck as to how she's going to keep her wedding a secret from the media, "Maybe I'll be permanently engaged!" she joked.

The 27-year-old Londoner certainly doesn't have to worry about her career, having become one of the most sought after leading ladies in Hollywood. Though reviews of Anna Karenina have been lukewarm, critics agree on Knightley's assured performance. Richard Corliss of Time Magazine said "Knightley embodies Anna as a girlish woman who has never felt erotic love; once smitten, she is raised to heavenly ecstasy before tumbling into the abyss of shame." Knighley recently completed filming Can a Song Save Your Life? a comedy drama about a dejected music business executive who forms a bond with a young singer-songwriter. Anna Karenina hits theaters in the U.S. on Friday (November 16, 2012)

Watch the trailer for Anna Karenina below: