Elenco

• 

  Ross Bagdasarian Jr.

  Alvin / Simon / David Seville (voice)

• 

  Janice Karman

  Theodore / Tommy's Sister (voice)

• 

  Frank Welker

  Santa Claus / Doctor (voice)

• C

  Charles Berendt

  Clyde Crashcup (voice)

• 

  R.J. Williams

  Tommy Waterford (voice)

• 

  June Foray

  Mrs. Waterford / Mrs. Claus