Il granduca e mister Pimm

Glenn Ford

John Lathrop Davis

Hope Lange

Millicent 'Millie' Mehaffey

Charles Boyer

M. Etienne Pimm

Ricardo Montalban

Duke Gaspard Ducluzeau

Telly Savalas

Dr. Christian Gump (Millie's uncle)

Ruth McDevitt

Mathilda

Ulla Jacobsson

Janine

Georgette Anys

Mme. Gallou

Robert Bettoni

Milkman

Mony Dalmès

Mme. Fernier

Laurence Hardy

Priory

Jean Le Maitre

Carlo

André Luguet

Maurice Zoltan

Jean Parédès

Freddie

Redmond Phillips

Starcy