Liberty Publishing via Wikimedia Commons
Humphrey Bogart met Lauren Bacall on the set of 1944's "To Have and Have Not" when he was 45 and she was 19. Despite Bogart being married at the time, they began an affair. Bogart divorced his wife in February 1945 and married Bacall in May 1945. The two remained together until Bogie's death in 1957.