After graduation, Cilento found work on stage almost immediately and was signed to a five-year contract by
Alexander Korda. Her first leading film role was in the British film
Passage Home (1955), opposite fellow Australian
Peter Finch. She was in
The Woman for Joe (1955) playing a Hungarian. Soon securing roles in British films and working steadily until the end of the decade, in 1956, Cilento was nominated for a
Tony Award for Best Supporting or Featured Actress (Dramatic) for
Helen of Troy in
Jean Giraudoux's
Tiger at the Gates. She was nominated for the
Academy Award for Best Supporting Actress for her performance in
Tom Jones in 1963 and appeared in
The Third Secret the following year. Cilento starred with
Charlton Heston in the 1965 film
The Agony and the Ecstasy, and with
Paul Newman in the 1967 western film
Hombre, and had a supporting role in
The Wicker Man (1973). She wrote the film
The Last Tango with Rudolph Valentino designed by painter
Patrick Hockey. Set in Sydney in 1975, it was about a woman so obsessed with Valentino that she has a shrine in her house to keep her memory of him alive. Cilento continued working as an actress, in films and television. In the 1980s, she settled in
Mossman, north of
Cairns, where she built her own outdoor theatre, named "Karnak", in the tropical rainforest. The venture allowed her to participate in experimental drama. In 2001, she was awarded the
Centenary Medal for "distinguished service to the arts, especially theatre". ==Personal life==