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
Hindle Edgar
Leopold
Marcus Barron
Anton Drexler
Betty Huntley-Wright
Lady's Maid
Bertram Dench
Engine Driver (uncredited)
Sybil Grove
Mme. Fouchett (uncredited)
B.M. Lewis
Domeyer (uncredited)
Bill Shine
Carl (uncredited)
John Singer
Boy (uncredited)
Cyril Smith
Secretary