• Johnny Cash as Finn
  • June Carter Cash as Lady Rainicorn
  • Vivian Liberto as Princess Bubblegum
  • Ray Cash as Jake
  • Rosanne Cash as Ice Cream Lady
  • Sam Phillips as Duke of Nuts
  • Luther Perkins as Choose Goose
  • Carl Perkins as Cinnamon Bun
  • Marshall Grant as Muscle Prince
  • Shelby Lynne as Fionna
  • Jerry Lee Lewis as Donut Guy
  • Jack Cash as Mr. Cupcake

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