"If You Ever Leave Me" is a vocal duet between Barbra Streisand and Vince Gill. The song was written by Richard Marx and produced by Marx and David Foster. It first appeared as a single on Streisand's 1999 album, A Love Like Ours. The single 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 appears on Barbra Streisand's Duets album, released in 2002.