The Duchess

The Duchess is a 2008 historical drama film directed by Saul Dibb. It is based on Amanda Foreman's biography of the late 18th-century English aristocrat Georgiana Cavendish, Duchess of Devonshire. She was an ancestor of Diana, Princess of Wales, where the quote ‘There were three people in her marriage’ in the promotional poster comes from. It was released in September 2008 in the United Kingdom. The film won the Academy Award for Best Costume Design, and was nominated for Best Art Direction.