Born on October 19, 1969, this American actor, animator, and filmmaker is best known for co-creating the groundbreaking animated series "South Park" alongside Matt Stone. He grew up in Colorado and attended the University of Colorado Boulder, where he met Stone. Beyond "South Park," he has co-written and directed the Tony Award-winning musical "The Book of Mormon." Known for his sharp satire and boundary-pushing humor, his work often critiques social and political issues.