Short answers, pulled from the story.
Vivien Leigh was born Vivian Mary Hartley on the 5th of November 1913 in Darjeeling, British India. Her father was a British broker born in Scotland and her mother was a devout Catholic of mixed Irish, Parsi Indian, and Armenian ancestry.
Vivien Leigh adopted the professional name Vivien Leigh after her agent John Gliddon rejected her birth name Vivian Holman. The playbill for The Mask of Virtue revised the spelling of her first name to Vivien and she quickly gained attention.
Vivien Leigh won her first Academy Award for Best Actress for the film Gone with the Wind which won ten Academy Awards. She declared to a journalist that she had cast herself as Scarlett O'Hara and was convinced by David O. Selznick after a screen test organized by George Cukor.
Vivien Leigh died on the 7th of July 1967 when she collapsed and suffocated as her lungs filled with fluid. Her tuberculosis resurfaced while she was rehearsing for A Delicate Balance in May 1967 and she was discovered dead on the floor about thirty minutes after midnight on the 8th of July 1967.
Vivien Leigh won a second Academy Award for Best Actress for playing Blanche DuBois in the film version of A Streetcar Named Desire. She originally played the role in the West End production in 1949 and later reprised it in the film version.