King of Hearts () is a 1947 German comedy film directed by Helmut Weiss and starring Hans Nielsen, Aribert Wäscher, and Sonja Ziemann. The film was the first production of Artur Brauner's CCC Films, which would later develop into a leading company in West German cinema. It was produced at the Tempelhof Studios in Berlin. The film's sets were designed by art director Ernst H. Albrecht. In the Soviet Zone of Germany, it was distributed by the state-owned company DEFA.
King Michael XXXVII has a doppelganger, Peter Petroni, who often makes sly remarks about the monarchy. In his role as sovereign, Michael bans the Petroni's writing. However, when the monarch gets drunk and misses his wedding day, one of his officials recruits the lookalike Petroni to take his place.