Rampling made her stage debut at the age of 14, singing French chansons with her sister at Bernays Institute in Stanmore. She began her career as a model and first appeared in a Cadbury advertisement. She was working as a secretary when she was noticed by a casting agent in the same building. Her first screen appearance, which was uncredited, was as a water skier in Richard Lester's film "The Knack ...and How to Get It". She also appeared as an extra in Lester's next directorial outing, the Beatles film "A Hard Day's Night" (1964). In 1965, she was cast in the role of Meredith in the film "Georgy Girl" and was given a role by John Boulting in the comedy "Rotten to the Core". In 1967, she starred opposite Yul Brynner in the adventure film "The Long Duel". She also appeared alongside Franco Nero in the Italian film "Sardinia Kidnapped" ("Sequestro di persona") (1968), directed by Gianfranco Mingozzi.