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)