Blair Erwin Underwood is an American actor. He made his debut in the 1985 musical film Krush Groove and from 1987 to 1994 starred as attorney Jonathan Rollins in the NBC legal drama series L.A. Law.

Krush Groove is a 1985 American musical comedy-drama film distributed by Warner Bros. Pictures that was written by Ralph Farquhar and directed by Michael Schultz. This film is loosely based on the early days of Def Jam Recordings and up-and-coming record producer Russell Simmons, portrayed by Blair Underwood in his feature film debut. Simmons was the film's co-producer and story consultant; he also had a cameo in the film as a club owner named Crocket.