Edmund Gwenn
Johann Strauss, the Elder
Esmond Knight
Johann Strauss, the Younger
Jessie Matthews
Resi Ebezeder
Fay Compton
Countess Helga von Stahl
Frank Vosper
Prince Gustav
Robert Hale
Ebezeder
Charles Heslop
Valet
Betty Huntley-Wright
Lady's Maid
Sybil Grove
Mme. Fouchett (uncredited)
Bill Shine
Carl (uncredited)
John Singer
Boy (uncredited)
Cyril Smith
Secretary (uncredited)
Hindle Edgar
Leopold
Marcus Barron
Anton Drexler
Bertram Dench
Engine Driver (uncredited)
B.M. Lewis
Domeyer (uncredited)