Alvin Seville / Simon Seville / Dave Seville (voice) (as Ross Bagdasarian)
Theodore Seville (voice)
Dr. Frankenstein (voice)
Mr. Yesman (voice)
The Monster / Man dressed up as Frankenstein / Sammy Squirrel / Movie Director (voice)
Tour Guide (voice)
Mother (voice)
Additional voices (voice)
Bud Wiley (voice)