Brett Kelly is best known for his role in Terry Zwigoff's edgy holiday comedy Bad Santa, opposite Academy Award winner Billy Bob Thornton. Kelly's portrayal of the cherubic Thurman Merman, otherwise referred to as The Kid by Thornton's character, earned him a Phoenix Film Critics Society Award for Best Performance by a Youth in a Lead or Supporting Role.

A native of British Columbia, Kelly began his acting career at the age of six with various television commercials. His other film credits include Like Mike 2: Streetball, The Sandlot 2, Cheats, Out Cold and Kill Me Later. Up next for Kelly is a role in the Showtime series Masters of Horror, which he will appear in the We All Scream for Ice Cream episode, directed by Tom Holland.