It Happened One Night (1934)
It Happened One Night is a 1934 American romantic comedy film with elements of screwball comedy directed by Frank Capra, in which a pampered socialite (Claudette Colbert) tries to get out from under her father's thumb, and falls in love with a roguish reporter (Clark Gable). The plot was based on the August 1933 short story "Night Bus" by Samuel Hopkins Adams, which provided the shooting title. It Happened One Night was one of the last romantic comedies created before the MPAA began enforcing the 1930 production code in 1934.
More at Wikipedia.