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Kent Rogers as Horton / Peter Lorre Fish (voice) (uncredited) |
 |
Sara Berner as Maysie / Baby (voice) (uncredited) |
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Mel Blanc as Mouse / Hunters / Audience Member (voice) (uncredited) |
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Frank Graham as Narrator (voice) (uncredited) |
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Robert Clampett as Various (voice) (uncredited) |
| Writing | Dr. Seuss | Novel |
| Production | Leon Schlesinger | Producer |
| Sound | Carl W. Stalling | Music |
| Directing | Robert Clampett | Director |
