The Story of Vernon and Irene Castle (1939)

In 1911, Vernon Castle, minor comic in a stage revue, pursues the leading lady to a New Jersey beach where, instead, he meets stage-struck Irene Foote. A few misadventures later, they're married; at Irene's insistence, they abandon comedy to attempt a dancing career, which only lands them in Paris without a sou. Fortunately, agent Maggie Sutton hears them rehearse and starts them on their brilliant career as the world's foremost ballroom dancers. But at the height of their fame, World War I begins.