Hi Diddle Diddle (1943)

Young Janie Prescott is about to be married to her sailor sweetheart, Sonny Phyffe, but the wedding is delayed because the ship hasn't arrived to its dock. The wedding ceremony has to be pushed forward, and is combined with a christening ceremony that is to be performed by the same pastor. Sonny's ship eventually docks and when he meets his father, small-time swindler Hector, before the wedding, he is given a corsage to pass on to Janie. Hector has actually stolen the corsage from Sonny's stepmother, opera singer Genya Smetana. Hector isn't aware of that the corsage has real diamonds in it, and it is a gift from the opera where Genya works. Unfortunately the wedding is yet again delayed when it is discovered that Peter Carrington III, Janie's previous suitor, has managed to lose all of Mrs. Prescott's money on bad investments and a roulette table at the 59 Club. The family is now broke. Sonny then tells Janie he doesn't care about her money and the wedding proceeds as planned, after Sonny agrees to let his father help Mrs. Prescott get her money back.
With the help of some friends Hector manages to fix the roulette tables at the 59 Club, and after the wedding he drags Sonny to the club before he goes off on his honeymoon. Sonny wins repeatedly, and Peter who watches, decides to make another attempt at sabotaging the relation between Janie and Sonny. He takes Janie, Mrs. Prescott and a Senator Simpson to 59 Club. Confusion and suspicion arises as Hector is seen with his friend, night club singer Leslie, in a compromising position, and then Janie sees Sonny in a similar way. Genya is oblivious about her step-son Sonny, whom she does not know even exhists, and Janie who he is about to marry, so she thinks Hector has married Janie and given her the stolen corsage.
Janie is then called to service as an air raid warden before she has time to go away on her honeymoon, while Sonny spends the night alone. To venge all the trouble that has arisen, Hector sets up to trick Peter into a bad business deal, buying worthless stock to a high price. Sonny owns such stock and when Peter is scammed, Sonny makes a fine profit. It turns out though that the banker in charge of the transaction bought the stock himself to make a good deal, and that Peter and Mrs. Prescott staged the loss of their property to test Sonny's intentions with Janie. Genya learns that Hector has a son from another relation, who is married to Janie. Sonny and Janie finally reunite at his father's apartment, and they spend the rest if their two-day honeymoon at her apartment. When a new order is given that Sonny has to travel immediately with his ship, the maid covers for the couple and lies, saying they already left town. Thus they get to be undisturbed for the weekend, and everyone else meet at Hector's apartment, singing Wagner opera songs together.

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