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Cast: Keira Knightley, Ralph Fiennes, Charlotte Rampling, Dominic Cooper and Hayley Atwell
Release date: September 19
Why you should see it: Keira Knightley plays Georgina, Duchess of Devonshire, the original "It Girl." The Duchess follows her scandalous rise and fall—filled with out-drinking, out-gambling and outwitting those around her—as she paves the way for her direct descendant, Princess Diana.
Box office bottom line: Gossip fans will love this flick that follows the original celebrity. Plus, with movies like Atonement and Pride & Prejudice under her belt, Keira Knightley has proven she can make period pieces successful.