With her doctor's approval, Leigh was well enough to resume acting in 1946, starring in a successful London production of Thornton Wilder's "The Skin of Our Teeth"; but her films of this period, "Caesar and Cleopatra" (1945) and "Anna Karenina" (1948), were not great commercial successes. All British films in this period were adversely affected by a Hollywood boycott of British films. In 1947, Olivier was knighted and Leigh accompanied him to Buckingham Palace for the investiture. She became Lady Olivier. After their divorce, according to the style granted to the divorced wife of a knight, she became known socially as Vivien, Lady Olivier.