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)