• Lily Mars as Sarah Hall-Small
  • John Thornway as The Cat in the Hat
  • Mrs. Thornway as Daisy-Head Mayzie
  • Owen Vail as Sam-I-Am
  • Mrs. Mars as Cindy Lou Who
  • Isobel Rekay as Pam-I-Am
  • Frankie as Mr. Brown
  • Leo as The Lorax
  • Violet as The White-Tufted Floozle Bird
  • Rosie as Annie DeLoo
  • Davey as Joey
  • Charlie Porter as King Derwin

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