Pendleton Ward Female Banana Guard, 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 BMO Guest Voice Weird Al Yankovic Banana Man Guest Voice Dee Bradley Baker Cinnamon Bun, Banana Guards Guest Voice Polly Lou Livingston Tree Trunks Guest Voice Maria Bamford Mama Trunks, Mrs. Pig Guest Voice Andrew Daly King of Ooo, Wyatt Guest Voice Ron Lynch Mr. Pig Guest Voice Fred Seibert Executive Producer Kelly Crews Producer Andy Ristaino Writer Cole Sanchez Writer Tom Herpich Writer Steve Wolfhard Writer