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 to do so, she replied that "being a widow is not a profession". During the filming of "The African Queen" (1951), Bacall and Bogart became friends with Katharine Hepburn and Spencer Tracy. She began to mix in non-acting circles, becoming friends with the historian Arthur Schlesinger Jr. and the journalist Alistair Cooke. In 1952, she gave campaign speeches for Democratic Presidential contender Adlai Stevenson. Along with other Hollywood figures, Bacall was a staunch opponent of McCarthyism. Bacall had a relationship with Frank Sinatra. During an interview with Turner Classic Movies's Robert Osborne, Bacall stated that she had ended the romance,