LOS ANGELES - The voice of Edna Krabappel has gone silent.
Actress Marcia Wallace, a long-running guest actress on "The Simpsons," died at age 70, according to several tweets sent out Saturday by co- stars on the long-running show.
Wallace was also known to 1970s television viewers as Carol Kester, the lovelorn and wise-cracking receptionist in "The Bob Newhart Show."
"Cheers to the hilarious, kind, fab Marcia Wallace, who has taken leave of us," wrote Yeardley Smith, who voices "Lisa." "Heaven is now a much funnier place because of you."
"Sad to learn of the passing of the marvelous Marcia Wallace," wrote Harry Shearer, the voice of Mr. Burns and other Springfield denizens. "Sorely missed already."
No cause of death has been revealed, but Wallace has been a breast cancer survivor for more than two decades, her friends reported.
Krabappel's cigarette-smoking, high-libido divorcee of a teacher was presence for 24 seasons on "The Simpsons," with a disdain for her profession and life voiced in a resigned, pessimistic way.
Entertainment Weekly reported that Wallace was born in Creston, Iowa and first appeared on "The Merv Griffith Show," as well as in bit parts on "Bewitched," "The Brady Bunch" and Columbo."
Her red-haired, feisty receptionist role as "Carol" played comedic counterpoint to Bob Newhart's measured and bemused calm. She was featured in 139 episodes of that show.
Later work included regular appearances on game shows and parts on "Magnum, P.I. and "Murder, She Wrote."
She won an Emmy for "The Simpsons" episode in which the lovelorn teacher got set up for a prank date with hockey star Gordie Howe by Bart.
There was no immediate word on survivors or services.