- Jim Piersall as Kermit the Frog
- John Piersall as Fozzie Bear
- Mary Piersall as Janice
- Dr. Brown as Dr. Bunsen Honeydew
- Mrs. Piersall as Miss Piggy
- Young Jim Piersall as Robin the Frog
- Reporter Slade as Sweetums (uncredited)
- Joe Cronin as Wayne (uncredited)
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