Alvin Seville / Simon Seville / Dave Seville (voice)
Ross Bagdasarian, Jr.
Theodore / Brittany / Jeanette / Eleanor (voice)
Janice Karman
Mr. Lawrence Talbot (voice)
Maurice LaMarche
Principal Milliken (voice)
Miriam Flynn
Mr. Rochelle (voice)
Rob Paulsen
Madame Raya (voice)
April Winchell