Margaret Moore Kennedy (1896-1967) was an English novelist and playwright. Her most successful work, as a novel and as a play, was The Constant Nymph. She was a productive writer and several of her works were made into films.Kennedy's first novel had been The Ladies of Lyndon (1923). She went on to write over 20 novels as well as publishing a biography of Jane Austen and a study of the art of fiction, Outlaws on Parnassus.