A Gentleman at Heart is a 1942 romantic comedy film starring Cesar Romero, Carole Landis, and Milton Berle.

When he and Tony check it out, however, Helen Mason (Carole Landis) informs them that the business is so far in debt it is worthless.

Trying to impress Helen, Tony buys a Rembrandt from Claire Barrington (Rose Hobart) for $20,000, only to have the gallery's art expert, Appleby (Francis Pierlot), unmask the painting as a very good fake.

Further complications arise when Stewart returns from his trip with Don Fernando (Steven Geray) and the genuine painting.

After Lucky kidnaps Don Fernando, a worried Tony buys the work for $100,000, then switches it with Gigi's forgery, only to have the government expert dismiss it as a bad copy.

To show Helen that he is not in it for the money anymore, Tony donates it to the government free of charge.