Guest Stars Jeff Bennett voices Choose Goose Steve Little voices Peppermint Butler Dee Bradley Baker voices Snow Golem Dee Bradley Baker voices Waffle Cone Trolls Ron Perlman voices The Lich David Bradley voices Old Finn Tom Kenny voices Ice King Maria Bamford voices Mother Worm Maria Bamford voices Chocoberry Maria Bamford voices Margaret Isabelle Fuhrman voices Shoko Andy Daly voices Wyatt Aryan Simhadri voices Tiffany Pendleton Ward voices Lumpy Space Princess Steve Little voices Gate Guardian Steve Little voices Turtle Princess Ron Lynch voices Mr. Pig Jill Talley voices Maja the Sky Witch Cole Sanchez voices Goblin Chris Fleming voices New Death Thomas Herpich voices Mr. Fox Polly Lou Livingston voices Tree Trunks Tom Scharpling voices Three Eyed Bird Corinne Kempa voices Life Tom Scharpling voices Jermaine Kent Osborne voices Joshua Co Starring John DiMaggio voices Additional Voices Jeremy Shada voices Additional Voices Hynden Walch voices Additional Voices Niki Hyun Yang voices Additional Voices Cole Sanchez voices Additional Voices Maria Bamford voices Additional Voices Steve Little voices Additional Voices Kent Osborne voices Additional Voices Tom Scharpling voices Additional Voices Chris Fleming voices Additional Voices