Actors Alec Baldwin and Kelsey Grammer agreed to loan their voice to the famous animated serial "The Simpsons".

Baldwin, who appeared on the show in 2002, will play Caleb Thorn, a marine biologist who attempts to steer Marge away from Homer and Grammer will reprise his role as Sideshow Bob.

Basketball player Dennis Rodman, Ricky Gervais, William H Macy, Lily Tomlin, Frances McDormand, boxer Joe Frazier, and Rob Reiner are among others who will make appearances on the show.

The 17th season will open Sept. 11, 8 p.m. ET. The Simpsons was again nominated at The 2005 Emmy for Outstanding Animated Program.