David Seville / Alvin Seville / Simon Seville (voice) (as Ross Bagdasarian)
Theodore Seville / Brittany Miller / Jeanette Miller / Eleanor Miller (voice)
Miss Rebecca Miller (voice)
Claudia Furschtien (voice)
Klaus Furschtien (voice) (as Anthony DeLongis)
Sophie / Native Chief / Baby Penguin / Additional Voices (voice)
Arabian Prince (voice)
Addditional Voices (voice) (as Philip Clark)
Inspector Jamal (voice)
Additional Voices (voice)
Additional Voices (voice) (as Charles Adler)
Additional Voices (voice) (as Pat Pinney)
Additional Voices (uncredited)