Tommy Kirk
— Tommy Carpenter
Annette Funicello
— Annette Aliotto
Nino Castelnuovo
— Bruno
Clelia Matania
— Aunt Gisella
Carlo Rizzo
— Uncle Mario
Ivan Desny
— Count Roberto
Venantino Venantini
— Lorenzo
Ivan Triesault
— Professor Levenson
Odoardo Spadaro
— Padrone
Renzo Palmer
— Carabiniere
Richard Watson
— Butler
Helen Stirling
— Miss Brooks
Elisa Cegani
— Felicia
Liana Del Balzo
— Countess Della Scala
George Ehling
— Gino