In The Duchess, Keira Knightley plays "the Empress of Fashion" -- Georgiana Spencer, the great-great-great-great aunt of Princess Diana who married William Cavendish, 5th Duke of Devonshire, in 1774. While many are drawing parallels between the two Spencer girls and their troubled marriages to men with pubic mistresses, Knightley didn't try for any parallels in her performance. "I think Georgina, on her own, is interesting enough to warrant one film, if not many films," she says. Find out more in our interview with Keira Knightley.