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 believed to be her best friend. Having no alternative, she became complacent over the matter. The arrangement among the three is more commonly referred to as a "ménage à trois", but, while the relationship between the duke and Lady Elizabeth was obviously sexual, there is no concrete evidence of anything beyond emotional dependence, and a particular and open affection, on the part of the duchess, towards Lady Elizabeth. In one of her letters, the Duchess of Devonshire wrote to Lady Elizabeth, "My dear Bess, Do you hear the voice of my heart crying to you? Do you feel what it