I might have to get over my current dislike of Jim Carrey for this one.
From MovieWeb.com:
Carol Burnett, Will Arnett, Seth Rogan, Isla Fisher, Dan Fogler, Amy Poehler, Dane Cook, Jaime Pressly and Jonah Hill are all lending their voices for the cast of the CG-animated comedy, Horton Hears a Who for 20th Century Fox Animation and Blue Sky Studios.
Jim Carrey will play Horton and Steve Carell will play the Mayor of Who-ville in the adaptation of the Dr. Seuss book; according to Variety, Burnett will voice the role of the always skeptical Kangaroo, however, no other characters were announced.
Will Arnett*, Amy Poehler, Steve Carell AND Seth Rogan? I'm there.
It'll be possible to just ignore Horton, right? I mean, I just watched Four Weddings and a Funeral last night, and discovered that if you ignore everything Andie McDowell does or says, it really is a decent movie. Kind of how Twin Peaks is so much better if you fast-forward through all of the Donna scenes. Especially the ones with lame-o Harold.