Directing
| Bo Welch | Director |
Writing
| Dr. Seuss | Novel |
| Alec Berg | Screenplay |
| David Mandel | Screenplay |
| Jeff Schaffer | Screenplay |
Production
| Brian Grazer | Producer |
| Karen Kehela | Executive Producer |
| Eric McLeod | Executive Producer |
| Maureen Peyrot | Executive Producer |
| Gregg Taylor | Executive Producer |
Sound
| David Newman | Original Music Composer |
Camera
| Emmanuel Lubezki | Director of Photography |
Editing
| Don Zimmerman | Editor |
Cast
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Mike Myers | as The Cat |
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Alec Baldwin | as Quinn |
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Kelly Preston | as Mom |
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Dakota Fanning | as Sally |
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Spencer Breslin | as Conrad |
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Amy Hill | as Mrs. Kwan |
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Sean Hayes | as Mr. Humberfloob / Voice of the Fish |
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Danielle Chuchran | as Thing One (as Danielle Ryan Chuchran) |
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Taylor Rice | as Thing One |
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Brittany Oaks | as Thing Two |
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Talia-Lynn Prairie | as Thing Two (as Talia Prairie) |