- Gerald O'Hara as Finn
- Barbara O'Neil as Princess Bubblegum
- Scarlett O'Hara as Lady Rainicorn
- Carreen O'Hara as Fionna
- Suellen O'Hara as Marceline the Vampire Queen
- Brent Tarleton as Mr. Cupcake
- Stuart Tatleton as Beemo
- Rhett O'Hara as Duke of Nuts
- Mammy as Cake
- Pork as Jake
- Prissy as Ice Cream Lady
- Jonas Wilkerson as The Lich
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