Noticed by Gene Kelly, she went to Hollywood to appear with him in the film "An American in Paris" (1951), which introduced her to the American public. She went on to appear in other musical films such as "Lili" (1953), for which she won a BAFTA Award for best actress, "The Glass Slipper" (1955), "Daddy Long Legs" (1955), opposite Fred Astaire, "Gaby" (1956) and "Gigi" (1958), to considerable acclaim. 