Pendleton Ward Creator Jeremy Shada Finn Voice John DiMaggio Jake Voice Hynden Walch Princess Bubblegum Voice Tom Kenny The Ice King Voice Olivia Olson Marceline Guest Voice Steve Little Duke of Nuts Guest Voice Maria Bamford Goblin King, Guardian Angel, Mimic Guest Voice Dee Bradley Baker Bucket Knight, Eyeball Monster, Jelly Monster Guest Voice Clancy Brown Demon Cat, Evil Guy Guest Voice Fred Seibert Executive Producer Kelly Crews Producer Larry Leichliter Director Luther McLaurin Writer Cole Sanchez Writer Elizabeth Ito Writer Adam Muto Writer