- Beth Anderson
- Background Singer
- Lewis Arquette
- Principal
- Stephanie Berg
- Background Singer
- Jessica Boddicker
- Background Singer
- Billy Bodine
- Background Singer
- Susan Boyd
- Background Singer
- Joseph Cousins
- Grandson
- Randy Crenshaw
- Background Singer
- Paul Eiding
- Mr. McGrew
- Miriam Flynn
- Yookie-Ann Sue / Teacher (voice)
- Henry Gibson
- Cat in the Hat
- John Christian Graas
- Einstein
- George Hearn
- Mayor
- Edie Lehmann Boddicker
- Background Singer
- Rick Logan
- Background Singer
- Donna Medine
- Background Singer
- Daniel Neciosup-Acuna
- Background Singer
- Regina Neciosup-Acuna
- Background Singer
- Clive Revill
- Van Itch
- Neil Ross
- (voice)
- Susan Silo
- Miss Sneetcher
- Benjamin Kimball Smith
- Butch
- Francesca Marie Smith
- Mayzie McGrew
- Susie Stevens-Logan
- Background Singer
- Brett Tattersol
- Background Singer
- B.J. Ward
- Mrs. McGrew
- Jonathan Winters
- Dr. Eisenbart
