- Molly Donahue as Princess Bubblegum
- Terence Donahue as Finn
- Tim Donahue as Jake
- Katy Donahue as Fionna
- Victoria Hoffman as Cake
- Lew Harris as Duke of Nuts
- Steve Donahue as Flambo
- Charles Gibbs as Starchy
- Eddie Dugan as Beemo
- Father Dineen as Mr. Cupcake
- Marge as Marceline the Vampire Queen
- Hatcheck Girl as Young Princess Bumblegum
- Lilliam Sawyer as Choose Goose
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