In Vienna, aspiring composer Johann Strauss Jr. clashes with his domineering father, who wants him to abandon music for a steady job in a bakery. Torn between his love for the baker’s daughter, Resi, and the encouragement of a wealthy countess, Strauss finds inspiration that leads to the creation of "The Blue Danube."
| Actor | Role |
|---|---|
 Edmund GwennJohann Strauss, the Elder | Johann Strauss, the Elder |
 Esmond KnightJohann Strauss, the Younger | Johann Strauss, the Younger |
 Jessie MatthewsResi Ebezeder | Resi Ebezeder |
 Fay ComptonCountess Helga von Stahl | Countess Helga von Stahl |
 Frank VosperPrince Gustav | Prince Gustav |
 Robert HaleEbezeder | Ebezeder |
 Charles HeslopValet | Valet |
| HHindle EdgarLeopold | Leopold |
| MMarcus BarronAnton Drexler | Anton Drexler |
 Betty Huntley-WrightLady's Maid | Lady's Maid |
| BBertram DenchEngine Driver (uncredited) | Engine Driver (uncredited) |
 Sybil GroveMme. Fouchett (uncredited) | Mme. Fouchett (uncredited) |
| BB.M. LewisDomeyer (uncredited) | Domeyer (uncredited) |
 Bill ShineCarl (uncredited) | Carl (uncredited) |
 John SingerBoy (uncredited) | Boy (uncredited) |
 Cyril SmithSecretary (uncredited) | Secretary (uncredited) |