Four Jacks and a Jill (1942)

Karanina "Nina" Novak, is befriended by Nifty, the leader of a four-piece orchestra, and in return, secures an engagement for them at the Little Aregal Cafe, with herself as the vocalist, by pretending she once knew the King or Aregal back in the old country. Steve shows up pretending to be the King of Aregal, and complicates the growing romance between Nina and Nifty. When Steve runs off with Opa, the real King of Aregal (also Steve) appears and complicates things again.