MGM Records was a record label started by the Metro-Goldwyn-Mayer film studio in 1946 for the purpose of releasing soundtrack albums of their musical films. It transitioned to a pop music label which continued into the 1970s. The company also released soundtrack albums of the music for some of their non-musical films as well, and on rare occasions, cast albums of off-Broadway musicals such as The Fantasticks and the 1954 revival of The Threepenny Opera. In one instance, it even released the highly successful soundtrack album of a film made by a rival studio, Columbia Pictures's Born Free (1966).