Director Alfred Hitchcock also saw the 1950 screen test and took full advantage of her beauty on-camera.
In January 1954, Kelly began filming scenes for her next film, The Bridges at Toko-Ri, with William Holden.
She played Nancy, the wife of naval officer Harry (Holden), who was a minor but pivotal character in the story.
Other films include High Noon (1952) with Gary Cooper, Dial M for Murder (1954) with Ray Milland, Rear Window (1954) with James Stewart, To Catch a Thief (1955) with Cary Grant, and High Society (1956) with Frank Sinatra and Bing Crosby.
Kelly retired from acting at the age of 26 to marry Rainier and began her duties as Princess of Monaco.
If Mogambo had been made in Arizona, I wouldn't have done it." Her role as Linda Nordley in MGM's production of Mogambo garnered her a Golden Globe Award for Best Supporting Actress and her first Academy Award nomination for Best Supporting Actress.
After the success of Mogambo, Kelly starred in a TV play The Way of an Eagle with Jean-Pierre Aumont, before being cast in the film adaptation of Frederick Knott's Broadway hit Dial M for Murder.
John was particularly displeased with her decision; he viewed acting as "a slim cut above streetwalker." To start her career, she auditioned for the American Academy of Dramatic Arts in New York, using a scene from her uncle George Kelly's The Torch-Bearers (1923).
Although the school had already met its semester quota, she obtained an interview with the admission officer, Emile Diestel, and was admitted through the influence of George.. While at school, she lived in Manhattan's Barbizon Hotel for Women, a prestigious establishment which barred men from entering after 10 pm, and she worked as a model to support her studies.
At 19, her graduation performance, was as Tracy Lord in The Philadelphia Story.