Mary Kay Bergman (June 5, 1961 – November 11, 1999), also credited as Shannen Cassidy, was an American voice actress and voice-over teacher. Bergman was the lead female voice actress on South Park from the show's 1997 debut 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. Born in Los Angeles, Bergman had an interest in fantasy and animation early in her life. She acted in plays during high school and also studied theater at University of California, Los Angeles (UCLA). After struggling to secure on-screen acting jobs, she began taking work as a voice-over actress. In 1989, she began voicing the Disney character Snow White. In the 1990s, she voiced Daphne Blake in three films from the Scooby Doo franchise as well as Timmy Turner in the Oh Yeah! Cartoons. Shortly after her death, her husband Dino Andrade established the Mary Kay Bergman Memorial Fund.
Toy Story 2
1999
Beauty and the Beast
1991
Mulan
1998
Hercules
1997
The Hunchback of Notre Dame
1996
The Iron Giant
1999
South Park: Bigger, Longer & Uncut
1999
Lady and the Tramp II: Scamp's Adventure
2001
Scooby-Doo on Zombie Island
1998
Scooby-Doo! and the Witch's Ghost
1999
Scooby-Doo and the Alien Invaders
2000
Alvin and the Chipmunks Meet Frankenstein
2001
Batman & Mr. Freeze: SubZero
1998
Annabelle's Wish
1997
Balto: Wolf Quest
2002
Scooby-Doo's Greatest Mysteries
1999
The Scooby-Doo Project
1999
The Life & Adventures of Santa Claus
2000
The Secrets of the 'Back to the Future' Trilogy
1990
The Bears Who Saved Christmas: Christopher & Holly
1994
Ellen's Energy Adventure
1996
Scooby-Doo/Courage the Cowardly Dog Scare-A-Thon
2000
Return Engagement
1978
Goin' Down to South Park
1999
Snowden's Christmas
1999
Maxine's Christmas Carol
2000
Anastasia
1997
Christmas Time in South Park
2007