• Michael "Mike" O'Halloran as The Cat in the Hat
  • Doug Roberts as Sam-I-Am
  • James "Jim" Duncan as The Lorax
  • Susan Franklin as Sarah Hall-Small
  • Harlee Claiborne as Mack the Turtle
  • Patty Duncan Simmons as Cindy Lou Who
  • Roger Simmons as Joey
  • Lisolette Mueller as Pam-I-Am
  • Harry Jernigan as King Derwin
  • U.S. Senator Gary Parker as The Picnic Bug
  • Dan Bigelow as Alvin the Alien
  • Lorrie as The White-Tufted Floozle Bird
  • Paula Ramsay as Sally
  • Will Giddings as Conrad
  • Mayor Robert "Bob" Ramsay as The Grinch
  • Kappy as Little Cat A
  • Scott as Terrence McBird
  • and more

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