The Marquise of O () is a 1976 period drama film directed by Éric Rohmer. Set in 1799, it tells the story of the Marquise von O, a virtuous widow, who finds herself pregnant and protests her innocence while possibly deserving to be exiled. The film was inspired by Heinrich von Kleist's 1808 novella "Die Marquise von O". The film won the Grand Prix Spécial Prize at the 1976 Cannes Film Festival.