A mysterious thief has stolen the prosperous Happy Valley's most prized possession: the musical Singing Harp. Can Mickey, Donald, and Goofy find the answer in the irritable Willie the Giant'... Read allA mysterious thief has stolen the prosperous Happy Valley's most prized possession: the musical Singing Harp. Can Mickey, Donald, and Goofy find the answer in the irritable Willie the Giant's magnificent castle up in the blue sky?A mysterious thief has stolen the prosperous Happy Valley's most prized possession: the musical Singing Harp. Can Mickey, Donald, and Goofy find the answer in the irritable Willie the Giant's magnificent castle up in the blue sky?
Walt Disney
- Mickey Mouse
- (voice)
Clarence Nash
- Donald Duck
- (voice)
Pinto Colvig
- Goofy
- (voice)
Sterling Holloway
- Narrator
- (voice)
Paul Frees
- Ludwig Von Drake
- (voice)
W.F. Banes
- Mickey Mouse's Singing Voice
- (uncredited)
Edgar Bergen
- Narrator
- (voice)
- (uncredited)
Billy Gilbert
- Willie the Giant
- (voice)
- (uncredited)
Anita Gordon
- Singing Harp
- (voice)
- (uncredited)
James MacDonald
- Mickey Mouse (some lines)
- (uncredited)
