We Were Dancing (1942)

Princess Victoria 'Vicki' Wilomirska and Baron Nicholas Eugen August Wolfgang 'Nikki' Prax are expatriate European nobles with no assets or property except their aristocratic pedigrees. They have become professional houseguests at homes of socially-ambitious nouveau-riche Americans who want the prestige of playing hosts to these titled spongers. However, when Vicki and Nikki want to get married, they find that married royals are not as in-demand as eligibly unmarried ones. Ultimately, one of these socially-attractive, unambitious bluebloods must do the unthinkable and actually get a job.