MARCIA WALLACE who voiced Edna Krabappel on THE SIMPSONS has died at age 70.

Wallace who first came to fame on The Bob Newhart Show, died from pneumonia.

Marcia Wallace’s voice and laugh were so unique that her character of Edna Krabappel is being retired as a result of the actress’ death on Friday.

She’d voiced Bart’s chain-smoking teacher, Mrs. Krabappel since The Simpsons first launched way back began in 1990.

 “She was beloved by all at The Simpsons and we intend to retire her irreplaceable character,” exec producer Al Jean told media.

Wallace was also a regular guest star on a host of popular TV shows in the 1970s and 1980s, from "The Love Boat" and "Fantasy Island" to "Gimme a Break!", "ALF," "Night Court," "Charles in Charge" and "Magnum, P.I."

She was appeared regularly guested on TV game shows such "The Hollywood Squares," "Password" and "The (New) $25,000 Pyramid" as well as numerous stage productions including a touring production of "The Vagina Monologues."

Although a Simpsons character was due to be killed off as part of the series storyline it was not Edna, The ENQUIRER has learned.

This is not the first time a Simpsons character has been retired because of death.

After Phil Hartmann was murdered in 1998, his character of pretty-boy actor Troy McClure never re-appeared on the show.