- Bobby Mercer as Finn
- Angel Mercer as Jake
- Jeremiah Mercer as Duke of Nuts
- Jack Mercer as Beemo
- Lt. Green as Starchy
- Detective Fowler as Chet
- Victor Sweet as Donut Guy
- Camille Mercer as Fionna
- Sofi as Lady Rainicorn
- Evelyn Mercer as Ice Cream Lady
- Robert Bradford as Choose Goose
- Evan as The Lich
- Darnell as Ice King
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