Diamonds for Breakfast

Marcello Mastroianni

as Grand Duke Nicholas Wladimirovitch Goduno

Rita Tushingham

as Bridget Rafferty

Elaine Taylor

as Victoria

Margaret Blye

as Honey

Warren Mitchell

as Popov

Leonard Rossiter

as Inspector Dudley

Bill Fraser

as Bookseller

Bryan Pringle

as Police Sergeant

Francesca Tu

as Jeanne Silkingers

David Horne

as Duke of Windemere

Charles Lloyd Pack

as Butler

Anne Blake

as Nashka

David Webb

as

Juba Kennerley

as Casino Patron (uncredited)

Ian Trigger

as Popov's assistant (uncredited)

Norman Mitchell

as (uncredited)

Nora Nicholson

as Anastasia Petrovna

Rosalind Knight

as Museum Visitor in Pink Dress (uncredited)