Holiday for Henrietta (1952)

After the rejection of their latest--preposterous--scenario, two scriptwriters get back to basics to prepare a new movie. The new scenario centers on Henriette, a pretty, lively Parisian, and how she spends the 14th of July in Paris with her fiancé. We follow the tribulations of Henriette as various other characters enter the story and turn a traditional festive day into something more adventurous than expected.