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