Gregory Ralph Evigan (born October 14, 1953) is an American actor best known for his roles on the TV series B.J. and the Bear, My Two Dads, P.S. I Luv U, and TekWar.

He began his career in theater, appearing in the Broadway production of Jesus Christ Superstar, followed by a stage production of the musical Grease, in which he portrayed the lead, Danny Zuko. He made his feature film debut in Scorchy (1976), then was cast as the lead in the comedy series B. J. and the Bear, in which he starred between 1979 and 1981.