"Phil Hartman - Larry Darlymple, God, Lionel Hutz, Troy McClure, Moose, Cable Guy, Plato, Horst, Jimmy Apollo, Lyle Lanley, Tom, Charlton Heston, Bill Clinton, Evan Conover"

"Mark Hamill - Himself, Leavelle"

"Larry Hagman - Wallace Brady"

"Matt Groening - Maggie Simpson, Himself"

"Josh Groban - Professor Frink"

"Kathy Griffin - Francine"

"Kelsey Grammer - Sideshow Bob"

"Topher Grace - Donny"

"John Goodman - Meathook"

"Sara Gilbert - Laura Powers"

"Ricky Gervais - Charles Heathbar"

"Sarah Michelle Gellar - Gina Vendetti"

"Neil Gaiman - Snowball II"

"Brendan Fraser - Brad"

"Jodie Foster - Maggie Simpson"

"Harvey Fierstein - Karl"

"R. Lee Ermey - Colonel Leslie Hapablap"

"Olympia Dukakis - Zelda"

"David Duchovny - Fox Mulder"

"Kirk Douglas - Chester J. Lampwick"

"Matt Dillon - Louie"

"Dan Castellaneta – Homer Simpson, Smitty, Grampa Simpson, Larry Darlymple, Barney Gumble, Gareth Prince, Mr. Winfield, Itchy, Cowboy Bob, Krusty the Clown, Sideshow Bob, Charlie, Ugolin, Scott Christian, Arnie Pye, Mayor Quimby, Bill, Kodos Johnson, Captain Lance Murdock, Sideshow Mel, Blue-haired Lawyer, Artie Ziff, Hans Moleman, Groundskeeper Willie, Squeaky-Voiced Teen, Mayor Quimby's body guards, Fallout Boy, Louie, Aristotle Amadopolis, Low Blow, Jack Marley, Richard Nixon, Jimmy Carter, Gary, Rich Texan, Leopold, Freddy Quimby, Guy Imprecto, Martin Prince (Adult), Matt Groening, Lee Carallo, Jimmy the Scumbag, Poochie, Gil Gunderson, Leprechaun, Mojo the Monkey, Chirpy Boy, Bart Junior, Sad-looking Frenchman, Man in dinner jacket, British Raj man, Yes Guy, Señor Ding-Dong, Cornelius Chapman, Phony McRing-Ring, Frankie the Squealer, Intelligent Homer, Dennis Miller's Voice, Professor Huntington, Garth Motherloving, Jesus Christ, Don Castellaneta, Snowball V, Stuart, C.H.U.M., SpongeBob, Howell Huser, New England RV-er, Gravedigger Billy, Bighorn Sheep, Good-looking bachelor, Headmaster Greystash, Incest Spuckler, Goofy, Genie, Grizzly Shawn"

"Danny DeVito - Herb Powell"

"Zooey Deschanel - Mary Spuckler"

"Rodney Dangerfield - Larry Burns"

"Willem Dafoe - The Commandant"

"Beverly D'Angelo - Lurleen Lumpkin"

"Simon Cowell - Henry"

"Shawn Colvin - Rachel Jordan"

"Stephen Colbert - Colby Kruse"

"Glenn Close - Mona Simpson"

"Don Cheadle - Brother Faith"