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 a sexual relationship with the duke. Lady Elizabeth engaged in well documented sexual relations with other men while she was in the "love triangle" with the duke and duchess. Among their contemporaries, the relationship between the Duchess of Devonshire and Lady Elizabeth Foster was the subject of speculation which has continued beyond their time. The love triangle itself was a notorious topic; it was an irregular arrangement in a high-profile marriage. Lady Elizabeth's affair with the Duke resulted in two illegitimate children: a daughter, Caroline Rosalie St Jules, and a son, Augustus Clifford. Despite her unhappiness with her detached and