Melville A. Leven (1914 -2007) known professionally as Mel Leven was an American composer and lyricist who had a long association with the Walt Disney Company, although he wrote songs for Peggy Lee ("Every Time"), The Andrews Sisters ("Commoners Boogy"), Nat King Cole, Dean Martin, and Les Brown, among others.

Leven was born in Chicago and is of Irish descent. His most famous song is arguably "Cruella de Vil" from the 1961 Disney animated feature One Hundred and One Dalmatians. That same year, he also wrote the story and new lyrics to sixteen tunes for the film Babes in Toyland. In later years, he wrote songs, stories, and did voice-over work for the PBS children's series Big Blue Marble, and well as working on a number of projects for television commercials. He also composed "When The Buzzards Return To Hinckley Ridge" for the 1969 Disney animated short, "It's Tough To Be A Bird", which went on to win the Academy Award for Best Short Subject in 1970. The song was sung by comedienne Ruth Buzzi.