Ross Bagdasarian, Jr.David Seville / Alvin Seville / Simon Seville (voice)
Janice KarmanTheodore / Brittany / Jeanette / Eleanor (voice)
Dody GoodmanMiss Rebecca Miller (voice)
Susan TyrrellClaudia Furschtien (voice)
Anthony De LongisKlaus Furschtien (voice)
Frank WelkerSophie / Native Chief / Baby Penguin / Additional Voices (voice)
Nancy CartwrightArabian Prince (voice)
Philip L. ClarkeAdditional Voices (voice)
