Winifred Carter (c. 1883–1949) was an English author and playwright, who was particularly active from the 1920s–40s (not to be confused with Winifred S Carter, an American celebrity chef and cookery author also active from the 1920s–40s).She was also the mother of the mystery and detective novel author Emery Bonett and the sister-in-law of novelist John L. Carter and actress and playwright Edith Carter.Winifred Carter's most successful work was probably her 1945 novel Princess Fitz, which was made into a 1947 film of the same name.It is a romance set in 1783, which chronicles the convoluted, yet ultimately doomed, relationship between a prince regent and a Catholic widow.