- Michael Shayne as Finn
- Catherine Wolff as Princess Bubblegum
- Anna Wolff as Fionna
- Dr. Haggard as Donut Guy
- Roger Blake as Duke of Nuts
- Dudley Wolff as Jake
- Phillips as Mr. Cupcake
- Chief of Police Jonathan Meek as Muscle Prince
- Alfred Dunning as Cinnamon Bun
- Zorah Bey as Choose Goose
- Coroner Tim Larsen as Starchy
- Caretaker as Beemo
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