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Allan Sherman as The Cat in the Hat (voice) |
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Daws Butler as Mr. Krinklebein the Fish (voice) |
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Pamelyn Ferdin as Sally (voice) |
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Tony Frazier as Boy (voice) |
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Gloria Camacho as Mother (voice) |
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Thurl Ravenscroft as Thing 1 (voice) |
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Gene Morford as Thing 2 (voice) (as Lewis Morford) |
| Writing | Dr. Seuss | Writer |
| Directing | Hawley Pratt | Director |
| Production | Dr. Seuss | Producer |
| Production | Chuck Jones | Producer |
| Visual Effects | Warren Batchelder | Animation |
| Visual Effects | George Nicholas | Animation |
| Visual Effects | Manny Gould | Animation |
| Production | David H. DePatie | Executive Producer |
| Visual Effects | Manuel Perez | Animation |
| Production | Friz Freleng | Executive Producer |
| Art | Maurice Noble | Production Design |
| Visual Effects | Hal Ambro | Animation |
| Sound | Dean Elliott | Music |
| Visual Effects | Phil Roman | Animation |
| Writing | Dr. Seuss | Book |
| Visual Effects | Robert Taylor | Animation |
| Visual Effects | Don Williams | Animation |
| Art | Richard H. Thomas | Background Designer |
| Directing | Robert Givens | Layout |
| Directing | Dick Ung | Layout |
| Editing | Lee Gunther | Editor |
| Editing | Roger Donley | Editor |
| Production | Jim Foss | Production Supervisor |
| Production | Harry Love | Production Coordinator |
| Art | Chuck Jones | Storyboard Artist |
| Sound | Eric Rogers | Conductor |
