Horton the elephant agrees to watch over lazy Maisie bird's egg while she vacations. Much later, after standing (and sitting) guard 100-percent faith- fully through rain and snow, Horton and the egg are captured by three hunters and put in a circus. Maisie happens by just as the egg is about to hatch and demands that Horton give it back to her.
- Sara Berner - Mayzie, Baby Elephant
- Mel Blanc - Mouse, Hunters, Audience Members
- Robert Clampett - Additional Voices
- Frank Graham - Narrator
- Kent Rogers - Horton the Elephant, Fish