Mary Kay Bergman was an American voice actress and voice-over teacher. She was known for her work in the animated sitcom South Park during its first three seasons and the theatrical film South Park: Bigger, Longer & Uncut. She had also voiced Timmy Turner in Oh Yeah! Cartoons, and Daphne Blake in the Scooby-Doo franchise from 1998 to 2000, and Disney Princess Snow White from 1989 until her death.
Bergman died on November 11, 1999 after committing suicide by gunshot at her home. She was replaced by Tara Strong as the voice of Timmy Turner on The Fairly OddParents and Grey DeLisle as the voice of Daphne Blake, while Mona Marshall and Eliza Schneider served as Bergman's successor for a number of female characters on South Park.