Matthew Richard `` Matt '' Stone ( born May 26 , 1971 ) is an Academy Award - nominated Emmy Award - winning American animator , screenwriter , director , producer , voice actor , musician and actor . Along with Trey Parker , he is one of the creators of the critically-acclaimed animated television series , South Park . Matthew Richard `` Matt '' Stone ( born May 26 , 1971 ) is an American screenwriter , producer , voice artist , musician and actor , best known for being the co-creator of South Park along with creative partner and best friend , Trey Parker .