The True Jacob () is a 1931 German comedy film directed by Hans Steinhoff and starring Ralph Arthur Roberts, Anny Ahlers, and Felix Bressart. It is based on a play by Franz Arnold and Ernst Bach which has been adapted into numerous films. It was shot at the Halensee Studios in Berlin. The film's sets were designed by the art director Franz Schroedter.
Peter Struwe, a strictly moralistic city councillor and head of a local purity league travels to a congress in Berlin where he inadvertently becomes entangled in the city's vibrant nightlife. While attempting to avoid a scandal, he meets the dancer Yvette, who mistakenly believes him to be a wealthy "patron" and follows him back to his conservative hometown. The situation escalates into a series of comedic misunderstandings as Struwe desperately tries to hide his "sinful" Berlin escapades from his suspicious wife and colleagues. The chaos is resolved when it is revealed that Yvette is actually the long-lost daughter of Struwe's own wife, leading the councillor to abandon his stuffy façade and embrace a more joyful outlook on life.