Horton ontdekt dat er een microscopische gemeenschap van intelligente wezens, genaamd de Whos, op een plant woont die alleen hij kan horen. Hij herkent de gevaren waarmee ze geconfronteerd worden en besluit ze te beschermen.
Nee, helaas is Horton Hears a Who! nog niet beschikbaar op Netflix in Nederland.
| Directing | Ben Washam | Director |
| Directing | Chuck Jones | Director |
| Writing | Dr. Seuss | Teleplay |
| Production | Dr. Seuss | Producer |
| Visual Effects | Irven Spence | Animation |
| Art | Philip DeGuard | Background Designer |
| Art | Irv Wyner | Background Designer |
| Visual Effects | Phil Roman | Animation |
| Visual Effects | Ben Washam | Animation |
| Visual Effects | Carl Bell | Animation |
| Visual Effects | Tom Ray | Animation |
| Art | Angel Esparza | Background Designer |
| Sound | Eugene Poddany | Music |
| Visual Effects | Richard Thompson | Animation |
| Production | Chuck Jones | Producer |
| Art | Maurice Noble | Production Design |
| Visual Effects | Hal Ambro | Animation |
| Visual Effects | George Nicholas | Animation |
| Visual Effects | Don Morgan | Layout Supervisor |
| Art | Don Foster | Graphic Designer |
| Writing | Dr. Seuss | Book |
