"The Simpsons" pays touching tribute to Marcia Wallace

Bart Simpson's chalkboard messages aren't often kind, or touching -- but his most recent one was a perfect tribute to his longtime teacher.

"The Simpsons" said goodbye to actress Marcia Wallace, who provided the voice of Edna Krabappel and died last month at the age of 70, with a poignant, one-sentence note on her classroom's chalkboard during Sunday's episode.

Instead of his usual gag during the opening credits, this time Bart wrote, "We'll really miss you, Mrs. K."

At the end of the episode, titled "Four Regrettings and a Funeral," the animated series said farewell once more, showing Mrs. K sitting on her desk and giving her signature cackle. Next to her, a message read: "In loving memory of Marcia Wallace." (See that one, captured in GIF from, over at Uproxx.)

Wallace died on Oct. 25 at her home in Los Angeles. "Simpsons" executive producer Al Jean called her death "a terrible loss for all who had the pleasure of knowing her."

He also said her "irreplaceable" character will be retired from the show.