Evelyn Keyes was Suellen O'Hara in Gone With the Wind, and Cecil B. DeMille's Pacific Union (both 1939) and starred in several film noirs such as Johnny O'Clock (1947) with Dick Powell, The Prowler (1951) with Van Heflin, 99 River Street (1953), and Hell's Half Acre (1954), the latter three of which I first saw at this past January's San Francisco Castro Theatre film noir festival hosted by Eddie Muller. She was also in numerous comedies, most of which unseen by me, but I plan to see more of her films such as these in the near future. Keyes was born November 16, 1916 and according to sources died on July 4, 2008. She was 91.
Her list of credits, where you can also see her brief bio for starters: http://www.imdb.com/name/nm0450810/