'The Simpsons' have paid tribute to Marcia Wallace.

The animated TV series had a touching blackboard message for the late actress - who died last month - who provided the voice for fourth-grade teacher Edna Krabappel or 'Mrs K.'

In the opening credits for the show lead male Bart Simpson is usually pictured writing lines on the blackboard as punishment from Mrs K.

However, on Sunday night's (3.11.13) episode Bart wrote: ''We'll really miss you Mrs. K.''

'The Simpsons' bosses have decided to discontinue Marcia's character and have claimed there was nobody who could replace her alter-ego.

Executive Producer, Al Green, previously wrote in a message posted on Facebook: ''I was tremendously saddened to learn this morning [26.10.13] of the passing of the brilliant and gracious Marcia Wallace. She was beloved by all at 'The Simpsons' and we intend to retire her irreplaceable character.''

Despite this the Fox series is produced so far in advance that the show's writers will have plenty of time to write a suitably emotional exit for Edna before she disappears from our screens.

Marcia, 70, died following to complications from pneumonia on October 25.