Harry Shearer, Voice of Mr. Burns, Leaves 'The Simpsons'

"Maggie took it hard," the show's executive producers said.

The show is in season 26.

Shearer, 71, followed that with, "This because I wanted what we've always had: the freedom to do other work. Of course, I wish him the very best."

Al Jean, the Fox series' showrunner, didn't hold back, calling Shearer a "malcontent" to the New York Post at the time, adding, "For someone earning millions off the show this year ... I just think it's unfathomable for him to take a shot at us."

In 2008, the cast held out for more money -- $500,000 per episode, allegedly -- but settled for $400,000 per show, according to reports. In 2012, the cast renegotiated a pay cut, but one not as severe as the network was seeking.

Last week, Fox put out a news release announcing the renewal through 2017, but did not include the names of any of its voice cast, prompting Shearer to tweet sarcastically, "Doesn't this show have a cast?"