Gardner appeared in several high-profile films from the 1940s to 1970s, including The Hucksters (1947), Show Boat (1951), Pandora and the Flying Dutchman (1951), The Snows of Kilimanjaro (1952), The Barefoot Contessa (1954), Bhowani Junction (1956), On the Beach (1959), 55 Days at Peking (1963), Seven Days in May (1964), The Night of the Iguana (1964), The Bible: In the Beginning. . . (1966), The Life and Times of Judge Roy Bean (1972), Earthquake (1974), and The Cassandra Crossing (1976). Gardner continued to act regularly until 1986, four years before her death in London in 1990, at the age of 67.