A New Jersey native, White began acting professionally on stage in her 20s. She also worked as a librarian and the personal assistant to actor Marlene Dietrich. ''Courage the Cowardly'', a Cartoon Network series, brought her global recognition for voicing Muriel, the elderly woman who adopts Courage into the family despite the grumpy attitude of her husband, Eustace. She voiced the character in all the episodes of the series, which ran for four seasons from 1999 to 2002. White also voiced Muriel in several spin-offs and specials, including “Scooby Doo” and “Courage the Cowardly Dog” crossover special, the video game “Cartoon Network Racing” and the short film “The Fog of Courage.'' Her last appearance as Muriel will be in animation movie ''Straight Outta Nowhere: Scooby Doo Meets Courage the Cowardly Dog'', scheduled to come out this year.