• Frederick Henry as Finn
  • Catherine Barkley as Fionna
  • Major Alessandro Rinaldi as Jake
  • Dr. Emerich as Choose Goose
  • Miss Van Campen as Princess Bubblegum
  • Helen Ferguson as Lady Rainicorn
  • Colonel Valentini as Cinnamon Bun
  • Major Stampi (as Jose Nieto) as Muscle Prince
  • Captain Bassi (as Georges Brehat) as Mr. Cupcake

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