She was the only French cinema actress to receive an Oscar until Juliette Binoche in 1997 (Supporting Actress) and Marion Cotillard in 2008 (Best Actress), and the first woman to win the award appearing in a foreign film. She was offered films in Hollywood, but turned them down, continuing to work in France and England--notably opposite Laurence Olivier in Term of Trial (1962)--until 1965. Earning another Oscar nomination for her work on what would be Vivien Leigh's final film--Columbia Pictures' Ship of Fools, also starring Lee Marvin--Signoret appeared in a few other Hollywood films before returning to France in 1969.
Vivien Leigh
Signoret