The Simpsons is killing off Bart Simpson. At least for one episode.

On this year's "Treehouse of Horror" episode, Sideshow Bob (Kelsey Grammer) will finally get the one thing he's wanted for the past 25 years: to kill Bart.

The Simpsons producers revealed the deadly news during their ATX Festival panel on Saturday. "I'm one of the people that always wanted the Coyote to eat the Roadrunner, so you can see where this is going," writer-producer Al Jean said. "I hated frustration comedy so we'll scratch that itch on the Halloween special."

40 must-see summer shows

Are you excited to finally see Sideshow Bob kill Bart?

TODAY'S VIDEO: That time Girl Meets World's Rowan Blanchard imagined herself as a pizza