Mary Kay Bergman, also credited as Shannen Cassidy, was an American voice actress and voice-over teacher. She was the lead female voice actress on South Park from the show's debut in 1997 until her death. Throughout her career, Bergman performed voice work for over 400 television commercials and voiced over 100 cartoon, film, and video game characters.
Grave of Mary Kay Bergman, at Forest Lawn Memorial Park, featuring etchings of characters she voiced on South Park
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.
South Park creators Trey Parker (left) and Matt Stone continue to do most of the writing, directing and voice acting on the show.
The Border Patrol raid during the Elián González affair is referenced in "Quintuplets 2000", which aired within the same week the event occurred.
Chef would often sing in a style reminiscent of that of his voice actor, Isaac Hayes.