Gregory J. Barnett is a stuntman, actor, second unit director and assistant director.

His stunt work includes, The Fifth Floor, Grease, The Guardian. As stunt coordinator he worked on Lime Street in 1986, Designing Women in 1990, The Butcher's Wife in 1991 and the television series Castle that starred Nathan Fillion as Richard Castle, a mystery-thriller writer who assists the NYPD in investigating murders. In 1986 the television serves Airwolf gained a Stuntman Association of Motion Picture Award for his work on the Annie Oakley.