Pendleton Ward Lumpy Space Princess Creator, Guest Voice Jeremy Shada Finn Voice John DiMaggio Jake Voice Hynden Walch Princess Bubblegum Voice Tom Kenny The Ice King Voice Niki Yang Lady Rainicorn Guest Voice Polly Lou Livingston Tree Trunks Guest Voice Dee Bradley Baker Mr. Cream Puff, Mr. Cupcake, Chet Guest Voice Maria Bamford Manfried, Chocoberry, Candy Corn Girl Guest Voice Jackie Buscarino Eclair Boy Guest Voice Steve Little Zombie Candy Heart, Peppermint Butler, Gumball Guardian 2 Guest Voice Keith Ferguson Frog, Lenny, Ripped Lumpy Guest Voice Fred Seibert Executive Producer Kelly Crews Producer Larry Leichliter Director Elizabeth Ito Writer Adam Muto Writer