Lauren Bacall in the script was originally much smaller, but during filming, her part was revised multiple times to extend it into the lead part that it became in the released film. Once released, "To Have and Have Not" catapulted Bacall into instant stardom, and her performance became the cornerstone of her star image, the impact of which extended into popular culture at large, even influencing fashion, as well as film-makers and other actors. Warner Bros. launched an extensive marketing campaign to promote the picture and to establish Bacall as a movie star. As part of the public relations push, Bacall made
Lauren Bacall not provided a quick career resurgence. "The Big Sleep" laid the foundation for her status as an icon of film noir. She would be strongly associated with the genre for the rest of her career, and would often be cast as variations of the independent and sultry femme fatale character of Vivian she played in the movie. As described by film scholar Joe McElhaney, "Vivian displays an almost total command of movement and gesture. She never crawls." Bacall was cast with Bogart in two more films. In "Dark Passage" (1947), another film noir, she played an enigmatic San Francisco artist.