- Tyler Gage as The Cat in the Hat
- Nora Clark as Sarah Hall-Small
- Mac as Sam-I-Am
- Skinny Carter as Sylvester McMonkey McBean
- Miles Darby as Joey
- Lucille Avila as Cindy Lou Who
- Director Gordon as King Derwin
- Brett Dolan as The Lorax
- Andrew as Norval the Fish
- Camille Gage as Pam-I-Am
- Omar as Joey
- Katherine Clark as The White-Tufted Floozle Bird
- Colin as Daisy-Head Mayzie
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