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 Olivia Olson Marceline Guest Voice Maria Bamford Slime Princess, Raggedy Princess, Syrup Guard Guest Voice Grey DeLisle Breakfast Princess, Peanut Princess Guest Voice Melany Ochoa Strudel Princess Guest Voice Dee Bradley Baker Cinnamon Bun, Syrup Guard Guest Voice Duncan Trussell Ron James Guest Voice Steve Little Abracadaniel, Bus Guest Voice Dana Snyder Magus of Life-Giving, Farmer Guest Voice Cole Sanchez Little Dude, Chinchizard Guest Voice Polly Lou Livingston Tree Trunks Guest Voice Katie Crown Water Nymphs Guest Voice Fred Seibert Executive Producer Kelly Crews Producer Seo Jung Kim Writer Somvilay Xayaphone Writer