Matthew Richard Stone is an American actor, animator, writer, producer, and musician. He is best known for co-creating South Park and The Book of Mormon (2011) with his creative partner Trey Parker. Intrigued by a career in entertainment at a young age, he studied film and mathematics at the University of Colorado Boulder, where he met Parker. During their attendance, the two worked on various short films and starred in the feature-length musical Cannibal! The Musical (1993).

South Park is an American animated sitcom created by Trey Parker and Matt Stone and developed by Brian Graden for Comedy Central. The series revolves around four boys—Stan Marsh, Kyle Broflovski, Eric Cartman, and Kenny McCormick—and their exploits in and around the titular Colorado town. South Park also features many recurring characters. The series became infamous for its profanity and dark, surreal humor that satirizes a large range of subject matter.