
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.

Family Guy
TV • 1999

South Park
TV • 1997

Spider-Man
TV • 1994

Johnny Bravo
TV • 1997

Cow and Chicken
TV • 1997

Buzz Lightyear of Star Command
TV • 2000

What a Cartoon!
TV • 1995

Captain Planet and the Planeteers
TV • 1990

Toy Story 2
MOVIE • 1999

Oh Yeah! Cartoons
TV • 1998

Beauty and the Beast
MOVIE • 1991

Extreme Ghostbusters
TV • 1997

Mulan
MOVIE • 1998

The Little Mermaid
TV • 1992

Fantastic Four
TV • 1994

Hercules
MOVIE • 1997

USA High
TV • 1997

The Early Show
TV • 1999