When You're in Love is a 1937 American musical film directed by Robert Riskin and Harry Lachman, who was not credited, and starring Grace Moore and Cary Grant.

She hires Hudson to marry her so that she can regain entry to the United States in time to give a benefit performance, stipulating that he must divorce her within six months to receive his final payment.

Once they have returned to the country and gone their separate ways, Hudson begins pursuing her, hoping to bridge their differences by drawing her from her own gilded world into his, and thus to turn their sham marriage into something real.

Cast notes: Writing for Night and Day in 1937, Graham Greene gave the film a poor review, primarily complaining of the acting of Grace Moore.

Characterizing Moore's acting as "sensible and hygienic", Greene found that the casting simply doesn't work with the crazy comedic plot and writing.