Marcus Dunstan is an American screenwriter and director who, along with Patrick Melton, wrote screenplay for the film Feast, which was the winner of Season Three of the filmmaking competition reality TV series Project Greenlight. Dunstan has since written the screenplays for Feast, Feast II: Sloppy Seconds, Feast III: The Happy Finish, The Collector, The Collection, Saw IV, Saw V, Saw VI, and Saw 3D, and in some cases, making cameo appearances in those films as well.

Patrick Melton is an American screenwriter, producer and novelist.