- Buster Moon as The Cat in the Hat
- Rosita as Joan
- Meena as Sally
- Johnny as Conrad
- Marcus the Big Daddy as Larry Quinn
- Gunter and Eddie Noodleman as Thing #1 and Thing #2
- Lance as Mr. Humberfloob
- Meena's Mother as Mrs. Kwan
- Mike as Fish
- Pete as Nevins
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