Sam Shaw, 1954. Marilyn Monroe over a subway grate from The Seven Year Itch. Cinema-marketing iconography.
From Wikipedia
Marilyn Monroe wore a white dress in the 1955 film The Seven Year Itch, directed by Billy Wilder. It was created by costume designer William Travilla and worn in the movie's best-known scene. The image of it and her above a windy subway grating has been described as one of the most iconic images of the 20th century.