I Married A Witch is a 1942 American romantic screwball comedy fantasy film directed by René Clair and written by Robert Pirosh and Marc Connelly. The film stars Veronica Lake as the titular witch whose plan for revenge goes comically awry, with Fredric March as her foil. The film also features Robert Benchley, Susan Hayward and Cecil Kellaway. The screenplay by Robert Pirosh and Marc Connelly and uncredited other writers, including Dalton Trumbo, is based on the 1941 novel The Passionate Witch by Thorne Smith, who died before he could finish it; it was completed by Norman H. Matson.