- State's Atty. Henry L. Harvey as The Cat in the Hat
- Madge Harvey as Sarah-Hall Small
- Chief Harold F. Robinson as Horton the Elephant
- Irene Nelson as Daisy-Head Mayzie
- John Waldron as The Grinch
- Dave Woods as The Lorax
- T.M. Wade as Mack the Turtle
- Mac McCreery as Joey
- Paul Harris as Sam-I-Am
- Det. Lt. White as Yertle the Turtle
- Stone as Thing One
- Whitney as Thing Two
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