Duke of Devonshire a separate title from that of Earl of Devon, which still belongs to the Courtenay family. The fifth Duke and Duchess of Devonshire are portrayed in the 2008 film "The Duchess" directed by Saul Dibb. The film is based on Amanda Foreman's biography of the scandalous 18th-century English aristocrat Georgiana Cavendish, Duchess of Devonshire (portrayed by Keira Knightley) and her relationship with the Duke (Ralph Fiennes) and his next wife, Lady Elizabeth Foster. Along with Jane Austen, the fifth Duke and his second wife appear, soon after Georgiana's death, in "Jane and the Stillroom Maid", a murder mystery by Stephanie
Georgiana Cavendish, Duchess of Devonshire When her father assumed the title of Viscount Spencer in 1761, she became The Honourable Georgiana Spencer. In 1765, her father became Earl Spencer and she Lady Georgiana Spencer. On her seventeenth birthday, 7 June 1774, Lady Georgiana Spencer was married to society's most eligible bachelor, William Cavendish, the 5th Duke of Devonshire (aged 25). The wedding took place at Wimbledon Parish Church. It was a small ceremony attended only by her parents, her maternal grandmother (Lady Cowper), one of her prospective brothers-in-law, and soon-to-be sister-in-law (the Duchess of Portland). Her parents were emotionally reluctant to let their daughter go,