Ivy is a 1947 American crime drama film directed by Sam Wood and starring Joan Fontaine, Patric Knowles, Herbert Marshall and Richard Ney.

[1] 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.

Despairing of her husband Jervis's poor prospects, Ivy sees an opportunity in wealthy Miles Rushworth and is determined to have him, despite being married and having the additional obstacle of her affair with the infatuated Dr. Roger Gretorex.

The staff of Variety magazine said of the film, "William Cameron Menzies' production has an off-the-beaten path design that helps generate the melodramatic mood desired.