Ross Bagdasarian Jr.
David Seville / Alvin Seville / Simon Seville (voice)
Janice Karman
Theodore / Brittany / Jeanette / Eleanor (voice)
Dody Goodman
Miss Rebecca Miller (voice)
Susan Tyrrell
Claudia Furschtien (voice)
Anthony De Longis
Klaus Furschtien (voice)
Frank Welker
Sophie / Native Chief / Baby Penguin / Additional Voices (voice)
Nancy Cartwright
Arabian Prince (voice)
Philip L. Clarke
Additional Voices (voice)
Ken Sansom
Inspector Jamal (voice)
George Poulos
Charlie Adler
Patrick Pinney
Jack Angel
Additional Voices (voice; uncredited)
Mel Blanc
