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. Moore sings "Minnie the Moocher" and the Ernesto Lecuona classic Cuban song "Siboney". Two of the other songs in the film – "Our Song" and "The Whistling Boy" – are by Jerome Kern and Dorothy Fields.

The film was briefly released on VHS tape during the 1980s but has never been officially released on DVD. On May 6, 2016 the getTV channel featured the broadcast premiere of a newly restored print of the film. Film critic Thomas Gladysz described it as "one of those 'old movies' few people have heard of, and even fewer have seen. Nevertheless, it is a charming and entertaining film deserving a wider audience."