William Edwin Bruce Jr. was an American country music songwriter, singer, and actor. He was known for writing the 1975 song "Mammas Don't Let Your Babies Grow Up to Be Cowboys" and recording the 1982 country number one hit "You're the Best Break This Old Heart Ever Had". He also co-starred in the television series Bret Maverick with James Garner during the 1981-1982 season.