Lauren Bacall for "To Have and Have Not" (1944), Bacall was so nervous that, to minimize her quivering, she pressed her chin against her chest, faced the camera, and tilted her eyes upward. This effect, which came to be known as "The Look", became another Bacall trademark, along with her sultry voice. Bacall's character in the film used Slim Hawks' nickname "Slim", and Bogart used Howard Hawks' nickname "Steve". The on-set chemistry between the two was immediate according to Bacall. She and Bogart (who was married at the time to Mayo Methot) began a romantic relationship several weeks into shooting. Bacall's role
Lauren Bacall manners, and taste. At Hawks' suggestion, Bacall was also trained to make her voice lower and deeper, instead of her normal high-pitched, nasal voice. Hawks had her, under the tutelage of a voice coach, lower the pitch of her voice. As part of her training, she was required to shout verses of Shakespeare for hours every day. Her height, at 5 feet 8½ inches (1.74 m), unusual among young actresses in the 1940s and 1950s, also helped her stand out. Her voice was characterized as a "smoky, sexual growl" by most critics, and a "throaty purr". During her screen tests