We all know that The Grim Adventures of Billy and Mandy ended with season 7 episodes and everybody was disappointed 'cause they wanted more new seasons, and plus, there should be season 8 that features the voice talents from Richard Horvitz, Grey DeLisle Griffin, Greg Eagles, Vanessa Marshall, Jane Carr, Jennifer Hale, Rachael MacFarlane, Renee Raudman, Chris Cox, Diedrich Bader, David Warner, Debi Derryberry, C. H. Greenblatt, Ronnie Schell, John Kassir, Phil LaMarr and Frank Welker. Also starring David Berón (replacing the late Henry Gibson respectively), Danny Cooksey, Scott Menville, Greg Cipes, Kel Mitchell, Kath Soucie and Cree Summer Francks. Sign this petition if you want The Grim Adventures of Billy and Mandy to come back to Cartoon Network for season 8 episodes.