Pendleton Ward Shelby, Banana Guards, Frog Creator, Guest Voice Jeremy Shada Finn Voice John DiMaggio Jake Voice Hynden Walch Princess Bubblegum Voice Tom Kenny The Ice King Voice Olivia Olson Marceline Guest Voice Niki Yang BMO, Lady Rainicorn Guest Voice Polly Lou Livingston Tree Trunks Guest Voice Emo Philips Cuber Guest Voice Jim Cummings Owl, Porcupine, Lenny the Beaver Guest Voice Marc Maron Squirrel Guest Voice Cole Sanchez Guest Voice Fred Seibert Executive Producer Kelly Crews Producer Larry Leichliter Director Tom Herpich Writer Steve Wolfhard Writer Skyler Page Writer Somvilay Xayaphone Writer