Diamonds for Breakfast: Cast
Marcello Mastroianni
Grand Duke Nicholas Wladimirovitch Goduno
Rita Tushingham
Bridget Rafferty
Elaine Taylor
Victoria
Margaret Blye
Honey
Warren Mitchell
Popov
Leonard Rossiter
Inspector Dudley
Bill Fraser
Bookseller
Bryan Pringle
Police Sergeant
Francesca Tu
Jeanne Silkingers
David Horne
Duke of Windemere
Charles Lloyd Pack
Butler
Anne Blake
Nashka
Juba Kennerley
Casino Patron (uncredited)
Ian Trigger
Popov's assistant (uncredited)
Norman Mitchell
(uncredited)
Nora Nicholson
Anastasia Petrovna
Rosalind Knight
Museum Visitor in Pink Dress (uncredited)