Brian Patrick O'Toole is an American film producer and screenwriter. O'Toole's work includes co-producing the 2002 horror film Dog Soldiers and his screenwriting debut Cemetery Gates. He also wrote a monthly column for the prominent American magazine Fangoria for six years and currently works with , with whom he has written and produced several films, including Basement Jack, , and A Necessary Evil. He also wrote the screenplays for the Atlas Shrugged film adaptations.