Vivien Leigh friendship developed after he congratulated her on her performance. Olivier and Leigh began an affair while acting as lovers in "Fire Over England" (1937), but Olivier was still married to actress Jill Esmond. During this period, Leigh read the Margaret Mitchell novel "Gone with the Wind" and instructed her American agent to recommend her to David O. Selznick, who was planning a film version. She remarked to a journalist, "I've cast myself as Scarlett O'Hara", and "The Observer" film critic C. A. Lejeune recalled a conversation of the same period in which Leigh "stunned us all" with the assertion that
Gone with the Wind (film) credits filed with the Screen Writers Guild, Sidney Howard was of course awarded the sole screen credit, but four other writers were appended ... Jo Swerling for contributing to the treatment, Oliver H. P. Garrett and Barbara Keon to screenplay construction, and Hecht, to dialogue ..." Principal photography began January 26, 1939, and ended on July 1, with post-production work continuing until November 11, 1939. Director George Cukor, with whom Selznick had a long working relationship, and who had spent almost two years in pre-production on "Gone with the Wind", was replaced after less than three weeks of shooting. Selznick