She is most famous for playing Scarlett O'Hara in Gone with the Wind in 1939 , and Blanche DuBois in A Streetcar Named Desire in 1951 . She won two Best Actress Academy Awards for playing `` southern belles '' : Scarlett O'Hara in Gone with the Wind ( 1939 ) and Blanche DuBois in A Streetcar Named Desire ( 1951 ) , a role she also played on stage in London 's West End .