Mary Kay Bergman: Mary Kay Bergman. Actress: South Park: Bigger, Longer & Uncut. Mary Kay Bergman did not have a face known to many - her voice was recognized more than anything else in the world. Although she was a big voiceover star in the 1990s, her true claim to fame was Trey Parker and Matt Stone's critically acclaimed adult animated television series, South Park (1997), in which she voiced almost all of...
