It Happened One Night -- Clark Gable and Claudette Colbert 1934
Old black and white that I had never seen, although it is one of the movies they always show a clip from, the famous hitchhiking scene where Clark is showing Claudette how to do it with his thumb, and no one stops. She shows her leg to the first car coming down the road and the brakes screech.
Cute little movie but waaaaay too long. Back in the days the studios were paying big stars big money. I'm thinking the studio wanted their moneys worth with Clark.