Gary Jules (born March 19, 1969 in Fresno, California as Gary Jules Aguirre) is an American singer-songwriter, best known for his cover of Tears for Fears' third single "Mad World", which he recorded together with friend Michael Andrews for the cult film Donnie Darko. It became the UK Christmas Number One single of 2003. Since then it has been used on popular American TV shows, and most recently in the commercial for the Xbox 360 video game Gears of War.

Some of his early projects / bands were The Ivory Knights, Our Town Pansies, Woodenfish, Kofi, The Origin, "Invisible", "No poetry," and "Heroes and Heroin."