Pendleton Ward Lumpy Space Princess Creator, Voice Jeremy Shada Finn Voice John DiMaggio Jake Voice Hynden Walch Princess Bubblegum Voice Tom Kenny The Ice King Voice Olivia Olson Marceline Voice Polly Lou Livingston Tree Trunks Guest Voice Ron Lynch Mr. Pig Guest Voice Ethan Maher Sweet P Guest Voice David Herman Randy Guest Voice Cole Sanchez Teen Randy Guest Voice Raza Jaffrey Danny Guest Voice Andrew Daly Wyatt, King of Ooo Guest Voice Maria Bamford Kookie Guest Voice Fred Seibert Executive Producer Kelly Crews Producer Tom Herpich Writer Steve Wolfhard Writer