• Born date: 1961-06-05
  • Born in: California
  • Death date: 1999-11-11
  • Death in: West Los Angeles
Mary Kay Bergman

Mary Kay Bergman (June 5, 1961 – November 11, 1999), credited on the first season and the first half of the second season of South Park as Shannen Cassidy, was an American actress, animation voice-over teacher, and comedian. Born in Los Angeles, she had an interest in fantasy and animation early in her life. She acted in plays in high school and also studied theater at UCLA.