- Josh Brent as Finn
- Nicole 'Nikki' Brent as Princess Bubblegum
- Detective Superintendent Frank Hanbury as Donut Guy
- Charles Standish as Cinnamon Bun
- Detective Inspector Tom Henderson as Duke of Nuts
- Helen Standish as Fionna
- Dr. Alan Richford as Choose Goose
- Clive Lang as Ice King
- Ralph Beldon as Starchy
- Strakarios as Jake
- Lyle as Chet
- Brinton as The Lich
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