Pendleton Ward Worm, Banana Guards 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 LeVar Burton Bubble Guest Voice Jessica Anne Bogart Sparkle's Mom, Ladybug, Mama Bird Guest Voice Dee Bradley Baker Bugs Guest Voice Kristen Schaal Jake Jr. Guest Voice Maria Bamford Lollipop Girl, Tonya Guest Voice Sam Marin Gareth, Flying Lettuce Brother Guest Voice Collin Dean Tiffany Guest Voice Kent Osborne Banana Guards Guest Voice Fred Seibert Executive Producer Kelly Crews Producer Tom Herpich Writer Steve Wolfhard Writer Ako Castuera Writer Jesse Moynihan Writer