Dan Castellaneta
Arnold's Grandpa, Earl, Willie the Jolly Olly Ice Cream Man, Nick Vermicelli, Dr. Murray Steiglitz, Dr. Steiglitz, Guard, Jolly Olly Man, Additional Voices, Animal Control Engineer, Announcer, Announcer at Resort, Arnold Skelter, Barber, Baseball Announcer, British Kid, Bus Driver, Cabbie, Canned Speech, Chicken Man, Cindy's Father, Conductor, Engineer, Fireman, First Midget, Grandpa, Grandpa 'Steely' Phil, Grandpa Phil, Grandpa's Father, Grubby, Ice Kentucky, Ivana, Jeweler, Jolly Old Man, Local Priest, Male Customers, Man with Chicken, Man with Golden Arm, Marv, Movie Ticket Seller, Moving Man, Peter, Police Officer, Policeman, Public Works Foreman, Referee, Rico, Robot, Rockwell, Salesman, Sergeant #2, Skip, TV Announcer, Talent Agent, Tournament Director, Willie the Jolly Olly Man, Wyatt