Barbara O'Neil (July 17, 1910-September 3, 1980) was an American actress. She appeared in the popular film Gone with the Wind (1939) and received an Academy Award nomination for her supporting role in All This, and Heaven Too (1940). Barbara O'Neil was born in St. Louis, Missouri. She began her acting career in summer stock. In July 1931 Bretaigne Windust, Charles Leatherbee (the grandson of Charles Richard Crane), and Joshua Logan, the three directors of the University Players, a three-year old summer stock company at West Falmouth on Cape Cod, were looking for a leading lady for their repertory season that winter in Baltimore. At the suggestion of George Pierce Baker, they auditioned and hired O'Neil, one of his talented students at the Yale School of Drama.
Contributions by Rossrs, Philip Cross, and Hrenrut.