• Jack Campbell as The Cat in the Hat
  • Kate Reynolds as Sarah Hall-Small
  • Cash as Sam-I-Am
  • Annie Campbell as Cindy Lou Who
  • Josh Campbell as Mack the Turtle
  • Arnie as The Lorax
  • Evelyn Thompson as Pam-I-Am
  • Alan Mintz as Joey
  • Sam Wong as Thidwick the Big-Hearted Moose
  • Jeannie as Joan
  • Paula as Sally
  • Lorraine Reynolds as The White-Tufted Floozle Bird
  • Adelle as Maysie
  • Ed Reynolds as Sylvester McMonkey McBean
  • Peter Lassiter as Little Cat B

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