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.

Filmography

• 2007Christmas Time in South Park — Sheila Broflovski / Shelley Marsh (voice)
• 2002Balto: Wolf Quest — Fox / Wolverine 3
• Jay Jay the Jet Plane
• 2001Lady and the Tramp II: Scamp's Adventure — Si (voice)
• 2000Bob's Video — Lady in Red / Telephone Voice / Radio Dispatcher (voice)
• Buzz Lightyear of Star Command — Alien Mom / Alien Kid (voice)
• 2000Maxine's Christmas Carol — Doris Lundquist / Frieda / Little Frieda / Bully (voice)
• 2000Scooby-Doo and the Alien Invaders — Daphne Blake (voice), In Memory Of
• 2000Scooby-Doo/Courage the Cowardly Dog Scare-A-Thon — Daphne Blake (voice)
• 2000The Life & Adventures of Santa Claus — Martha / Nymph (voice)
• 1999Alvin and the Chipmunks Meet Frankenstein — Mother (voice)
• 1999Deep Blue Sea — Parrot (voice) (uncredited)
• Family Guy — Sherry (voice)
• 1999Scooby-Doo! and the Witch's Ghost — Daphne (voice)
• 1999Scooby-Doo's Greatest Mysteries — Daphne (voice)
• 1999Snowden's Christmas — (voice)
• 1999South Park: Bigger, Longer & Uncut — Liane Cartman / Sheila Broflovski / Sharon Marsh / Carol McCormick / Wendy Testaburger / Clitoris / Additional Voices (voice)
• The Big Guy and Rusty the Boy Robot
• The Early Show
• 1999The Iron Giant — Additional Voices (voice)
• 1999The Scooby-Doo Project — Daphne Blake (voice)
• 1999Toy Story 2 — Additional Voices (voice)
• 1998Batman & Mr. Freeze: SubZero — Barbara Gordon / Batgirl (voice)
• 1998Mulan — Additional Voices (voice)
• Oh Yeah! Cartoons — Timmy Turner (voice)
• 1998Scooby-Doo on Zombie Island — Daphne Blake (voice)
• Scooby-Doo! Behind the Scenes — Daphne Blake (voice)
• The Secret Files of the Spy Dogs
• 1997Anastasia — Olga/Empress Alexandra
• 1997Annabelle's Wish — Hens (voice)
• Cow and Chicken — Sandy (voice)
• Extreme Ghostbusters
• 1997Hercules — Earthquake Lady (voice)
• 1997Hercules — Hera (voice) / Iphicles (voice) / Princess Arianna (voice) (uncredited)
• I Am Weasel — Sandy (voice)
• Johnny Bravo
• South Park — Liane Cartman / Wendy Testaburger / Sharon Marsh / Sheila Broflovski (voice)
• USA High — Ricki (voice)
• 1996Ellen's Energy Adventure — Female WNRG Newscaster (voice)
• The Fantastic Voyages of Sinbad the Sailor
• 1996The Hunchback of Notre Dame — Quasimodo's Mother (voice)
• 1996The Kitchen Casanova — Doris (voice)
• What a Cartoon! — Doris (voice)
• Fantastic Four — Princess Anelle (voice)
• Spider-Man — Gwen Stacy (voice)
• 1994The Bears Who Saved Christmas: Christopher & Holly — Holly (voice)
• The Tick — Ottoman (voice), Ants / Secretary (voice)
• The Little Mermaid — Arista (voice)
• 1991Beauty and the Beast — Bimbette (voice)
• Rugrats — Spokes / Friendly Boy (voice)
• Captain Planet and the Planeteers — Dr. Blight (voice)
• 1990The Secrets of the 'Back to the Future' Trilogy — Young Girl Voice
• 1978Return Engagement — Mary

Appearances as themselves (1)

• 1999Goin' Down to South Park — Self