Eric Stough (born July 31, 1972) is the animation director and producer of the Emmy and Peabody Award-winning television series South Park. He was also the animation director of South Park: Bigger, Longer & Uncut and has worked with Trey Parker and Matt Stone on Orgazmo, Team America: World Police and the Broadway hit The Book of Mormon.
Stough met Parker in high school where they did short films and were in plays together. Stone was in Stough's short film The Diner in college at the University of Colorado. Prior to his work with Parker and Stone, Stough had internships with Jim Henson Productions and Walt Disney. Stough is originally from Evergreen, Colorado, and the South Park character Leopold "Butters" Stotch is based on him. Stough also does the un-muffled voice of Kenny McCormick on the show.