Ivy is a 1947 American crime drama film directed by Sam Wood and starring Joan Fontaine, Patric Knowles, Herbert Marshall and Richard Ney. It written by Charles Bennett, based on the 1927 novel The Story of Ivy by Marie Adelaide Belloc Lowndes. It was distributed by Universal Pictures. The film was entered into the 1947 Cannes Film Festival.

The song "Ivy," written to promote the film by Hoagy Carmichael but not included in the soundtrack, has become a jazz standard. The film was later adapted in 1951 for the radio version of the NBC drama anthology show Screen Directors' Playhouse, with George Marshall directing in place of Wood, who had died two years after the film's completion in 1949, and Fontaine reprising the title role as Ivy Lexton.