<P> On a ten day fishing trip, independent director Howard Hawks tried to convince Ernest Hemingway to write him a script, but Hemingway wasn't interested . Hawks insisted that he could make a film from his "worst story". Although Hawks had a high regard for Hemingway's works in general, he considered To Have and Have Not to be his worst book, a "bunch of junk", and told Hemingway so . Hemingway and Hawks worked on the screenplay during the remainder of the fishing trip . In May 1939, Hemingway sold book rights to Howard Hughes . Hughes sold the book rights to Hawks in October 1943, who sold them to Warner Bros. Hemingway and Hawks had discussed that the film was not going to resemble the novel, and would rather tell the story of how Morgan met Hawks's character Marie that he developed for the film . Humphrey Bogart was cast by Warner Bros. in early 1943 . Lauren Bacall was then a 18 - year - old model . She appeared on the cover of Harper's Bazaar, and was noticed by Hawks' wife, Nancy "Slim" Keith, who showed the cover photo to her husband . Hawks sought Bacall out in April 1943 and signed her for the role, her first movie appearance . In the movie, Harry calls her by the nickname "Slim", and she calls him "Steve", the nicknames used between Keith and Hawks . The initial screenplay was completed on October 12, 1943 and resembled the novel more than the final screenplay . </P> <P> Hawks instructed Jules Furthman, who had worked on the screenplay, to alter Marie's character to be more sultry and masculine, resembling Marlene Dietrich . After Bacall turned nineteen, Hawks changed her name to Lauren Bacall (she was born Betty Perske) and shot her screen test in January 1944 . Hawks instructed Furthman to work on the final screenplay and stop writing the second version of the screenplay which had Bacall in a minor role in case she proved to be poor for the role . Furthman worked on the screenplay throughout January and February 1944 and completed it before February 14, 1944 . </P> <P> As the movie was filmed during World War II, Hawks moved the setting from Cuba to Vichy - controlled Martinique as required by the Office of the Coordinator of Inter-American Affairs to placate the Roosevelt administration . They objected to the unfavorable portrayal of Cuba's government as against the U.S. government's "Good Neighbor" policy toward Latin American nations . This change created many similarities to the plot of Bogart's earlier, highly successful Casablanca (1942). Other changes tended in the same direction, such as the introduction of a sympathetic piano player as an important supporting character . Carmichael's Cricket was not in the Hemingway book, and parallels Dooley Wilson's Sam in Casablanca . Several cast members from Casablanca also appear in the film; apart from Bogart and Dalio (Emil in Casablanca), Dan Seymour (Abdul in Casablanca) plays Captain Renard, whose name and position parallel Captain Renault in Casablanca . As in Casablanca, Bogart's initially reluctant character assists husband - and - wife Resistance members . </P> <P> The film preserves the book's title, and the names and characteristics of some of the characters, but nothing from beyond the first fifth of the volume . Another novelist William Faulkner, an intense rival of Hemingway, but "out of print and broke", also worked on the script . The screenplay was developed further by Jules Furthman and, near the end, by Faulkner . Furthman stopped writing after Faulkner was brought on the project . Faulkner was hired on by Hawks on February 22, 1944 to avoid recounting political conflict between Free France and the Vichy government in the storyline . Each scene was written three days before it was filmed . The final cast reading was done on March 6, 1944 with final script changes finished by April 22 . Line by line, Hawks and Bogart changed the script to create a more sexual and comedic film . Filming was completed May 10, 1944 . Bogart and Hawks served as their own technical advisors, because of their experience with fishing and sailing . </P>

Where was to have and have not filmed