Edmund Gwenn as Johann Strauss, the Elder

Esmond Knight as Johann Strauss, the Younger

Jessie Matthews as Resi Ebezeder

Fay Compton as Countess Helga von Stahl

Frank Vosper as Prince Gustav

Robert Hale as Ebezeder

Charles Heslop as Valet

Hindle Edgar as Leopold

Marcus Barron as Anton Drexler

Betty Huntley-Wright as Lady's Maid

Bertram Dench as Engine Driver (uncredited)

Sybil Grove as Mme. Fouchett (uncredited)

B.M. Lewis as Domeyer (uncredited)

Bill Shine as Carl (uncredited)

John Singer as Boy (uncredited)

Cyril Smith as Secretary (uncredited)