- Leona Stevenson as Princess Bubblegum
- Henry J. Stevenson as Finn
- Sally Hunt Lord as Fionna
- Dr. Philip Alexander as Jake
- Waldo Evans as Beemo
- James Cotterell as Chet
- Fred Lord as Mr. Cupcake
- Morana as Starchy
- Joe - Detective as Duke of Nuts
- Peter Lord as Ice King
- Elizabeth Jennings as Lady Rainicorn
- Harpootlian as Muscle Prince
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