How did Vivacious Lady bring Ginger Rogers and James Stewart together on screen?

In the 1938 screwball comedy Vivacious Lady, director George Stevens brought Ginger Rogers and James Stewart together on screen by casting them as a couple who marry after meeting, with the plot centering on the husband's attempts to keep their union a secret. In the film, Rogers portrays a nightclub singer who weds a professor played by Stewart, with comic support provided by Charles Coburn and Beulah Bondi. The film was a box-office success and marked a return to form for Stevens.1