- Drake as The Cat in the Hat
- Johnny Kassir as Mack the Turtle
- Andrew Hill Newman as Horton the Elephant
- Barney the Security Guard as Joey
- Dan Sachoff as Norval the Fish
- Josh as Sam-I-Am
- Nancy Sullivan as Sarah Hall-Small
- Amanda as Cindy Lou Who
- Raquel Lee as Pam-I-Am
- Jenna as The White-Tufted Floozle Bird
- Mr. Oldman as The Grinch
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