"If You Ever Leave Me" is a vocal duet between American singers Barbra Streisand and Vince Gill. The song was written by Richard Marx, and produced by Marx and David Foster. It first appeared as a song on Streisand's twenty-eighth studio album, A Love Like Ours (1999), and was released as an international CD single that included three additional tracks, two of which were recorded during the A Love Like Ours sessions but were not included on the album. The song later was included on Streisand's Duets album, released in 2002.