Pendleton Ward Creator, Writer Jeremy Shada Finn Voice John DiMaggio Jake Voice Hynden Walch Princess Bubblegum Voice Tom Kenny The Ice King Voice Maria Bamford Ghost Princess, Warrior Princess, Dumb Rock Guest Voice Sam Marin Clarence, Muscular Ghost 3 Guest Voice Kent Osborne Ghost Announcer, Muscular Ghost 2, Joshua Guest Voice Cole Sanchez Boilbee, Clerk Guest Voice Niki Yang BMO, Fruit Witch 3 Guest Voice Melissa Villaseñor Fruit Witch 2 Guest Voice Noah Nelson Kee-Oth, Hot Dog Monster Guest Voice Fred Seibert Executive Producer Kelly Crews Producer Larry Leichliter Director Ako Castuera Writer Jesse Moynihan Writer Natasha Allegri Writer Adam Muto Writer