Kenny is the group with the most sexual knowledge and experience. Kenneth "Kenny" McCormick, voiced by Matt Stone, is one of South Park's main characters, along with Eric Cartman, Stan Marsh, and Kyle Broflovski. He first appears in the short films both entitled The Spirit of Christmas in 1992 and 1995. He is voiced by Mike Judge in the feature film South Park: Bigger, Longer & Uncut and Eric Stough in "The Jeffersons", "Lice Capades", "Mysterion Rises", and "Turd Burglars". 19 years old