- Mike Church/Roman Strauss as Finn
- Amanda Sharp/"Grace"/Margaret Strauss as Lady Rainicorn
- Gray Baker as Jake
- Franklyn Madson as Beemo
- "Piccolo" Pete Dugan as Mr. Cupcake
- Dr. Cozy Carlisle as Ice King
- Inga as Princess Bubblegum
- Doug as Cinnamon Bun
- Sister Madeleine as Fionna
- Father Timothy as Chet
- Frankie as Duke of Nuts
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