Pendleton Ward Creator Jeremy Shada Finn Voice John DiMaggio Jake Voice Hynden Walch Princess Bubblegum Voice Tom Kenny The Ice King Voice Cloris Leachman Old Marceline Guest Voice Ron Perlman The Lich Guest Voice Ming-Na Wen Finn's Mom Guest Voice Eric Bauza Tromo Guest Voice Kumail Nanjiani Prismo Guest Voice James Kyson Big Destiny, Trami Guest Voice Jeff Bennett Choose Bruce Guest Voice M. Emmet Walsh Cosmic Owl Guest Voice Fred Seibert Executive Producer Kelly Crews Producer Larry Leichliter Director Tom Herpich Writer Jesse Moynihan Writer Cole Sanchez Writer Rebecca Sugar Writer