Jack Black, Jon Stewart, Stephen Colbert and a returning Sideshow Bob will help animate the 19th season of "The Simpsons" this fall.

The long-running FOX show has signed up another eclectic roster of guest voices for 2007-08, starting off with Lionel Richie in the season premiere on Sunday, Sept. 23. In the episode, after Homer saves Mr. Burns from drowning, Burns takes him to Chicago aboard his private plane -- with Richie, who composes a customized version of "Say You, Say Me" for Homer, in tow.

Other early-season guests include "Sopranos" and "Fargo" veteran Steve Buscemi, who plays a bank robber on the Sept. 30 episode, and Jack Black, who on Oct. 7 opens a rival comics store in Springfield, much to the chagrin of Comic Book Guy.

That episode will also feature cameos from three well-known graphic novel artists: Dan Clowes ("Ghost World"), Art Spiegelman ("Maus," "In the Shadow of No Towers") and Alan Moore ("Watchmen," "V for Vendetta").

Kelsey Grammer (who also stars in FOX's new comedy "Back to You") will make his 10th appearance as the homicidal Sideshow Bob. His "Frasier" co-stars David Hyde Pierce and John Mahoney will join him as, respectively, Bob's brother Cecil and their father.

Among the other guest voices lined up for the season include Stewart, Colbert, tenor Placido Domingo, former CBS News anchor Dan Rather, a returning "Weird" Al Yankovic, Matt Dillon, Kurt Loder, Beverly D'Angelo, Maya Rudolph and Topher Grace.