Wallace joined FOX's long-running animated hit "The Simpsons" in 1990, and appeared as Krabappel in over 100 episodes. She won an Emmy for the role in 1992.
According to a "Simpsons" spokesperson, she was caught up on her recordings and will be heard in several upcoming episodes. The show is reportedly planning to retire the character.
Wallace was also a gameshow regular in the 1970s, including frequent appearances on "Hollywood Squares", "The $25,000 Pyramid" and "Match Game." She also appeared on "The Merv Griffin Show" more than 75 times.
She also played Carol Kester on "The Bob Newhart Show," and popped up on numerous other shows, including "Charles In Charge," "Murder, She Wrote," "Taxi," "Magnum, P.I.," and "A Different World."
Below is a statement from producer Al Jean, on behalf of "The Simpsons":
Everything: The Simpsons
Latest news, photos, reviews, interviews, videos and more.