What made 1939 the watershed year was the release of several critically acclaimed movies, including The Wizard of Oz and Mr. Smith Goes to Washington. But the most famous of the bunch, and perhaps the most famous movie of all, is Gone With the Wind, and one of the most remarkable aspects of the film is that the quintessential Southern belle was played by Vivien Leigh, a British actress still relatively unknown in Hollywood. Vivien was an accomplished stage actress and had already appeared in foreign films during the 1930s, but she was a complete dark horse to get the iconic role she's still associated with, and it only came about because of her persistence in getting cast for the role. 30 years after Gone With the Wind was released, one film critic credited Selznick's "inspired casting" of Vivien Leigh as Scarlett with the film's success. Another 30 years later, the same critic wrote that Leigh "still lives in our minds and memories as a dynamic force rather than as a static presence."
While Gone With the Wind made Leigh a big name practically overnight, she continued to buck the usual trend by doing Broadway and even appearing on stage in London during the 1940s, instead of focusing on movies. A lot of this was no doubt due to her famous marriage to Laurence Olivier, himself an accomplished stage and film actor. At the same time, Vivien became notorious for being difficult to work with and unusually temperamental, a byproduct of bipolar disorder that frequently affected her mood and occasionally left her incoherently hysterical.