• Nan Spencer as Sarah Hall-Small
  • Rosita Rivas as Cindy Lou Who
  • Jay Williams as The Cat in the Hat
  • Monte Blanca as Sam-I-Am
  • Terry McCracken as Pam-I-Am
  • Walter McCracken as Mack the Turtle
  • Boris as Norval the Fish
  • Rafael as The Lorax
  • Arbolado as Mr. Brown
  • Maria as The White-Tufted Floozle Bird

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