A Letter to Three Wives is a 1949 American romantic drama film which tells the story of a woman who mails a letter to three women, telling them she has left town with the husband of one of them. It stars Jeanne Crain, Linda Darnell, Ann Sothern, Paul Douglas in his film debut, Kirk Douglas, Jeffrey Lynn, and Thelma Ritter. An uncredited Celeste Holm provides the voice of Addie Ross, the unseen woman who wrote the titular letter.
The movie was adapted by Vera Caspary and Joseph L. Mankiewicz from Letter to Five Wives, a 1946 novel by John Klempner, which had appeared in Cosmopolitan. It was directed by Mankiewicz, who directed All About Eve the following year.
The film won the Academy Awards for Best Director and Best Writing, Screenplay and was nominated for Best Picture.