Gregory Alan Williams (Born on June 12, 1956) is an actor and author who portrayed Garner Ellerbee in Baywatch; Season 1, Season 3 to Season 5 as a cast regular, recurring role in Season 2 and Season 8 and a cast regular in the spin off Baywatch Nights.

He is currently playing Robert "Mac" MacCready in the American drama Greenleaf and is also playing a role in a detective movie called The B Team along with other Baywatch cast members Jeremy Jackson, David ChokachiJaason Simmons, Michael Bergin, Alexandra Paul and Kelly Packard.

In his early years, Williams had enlisted in the U.S. Marine Corps, and was featured in a brouchure about Marines who had excelled in civilian life.

Characters portrayed by Gregory Alan Williams on the show[]