AN EDUCATION (12A).

Drama/Romance. Carey Mulligan, Peter Sarsgaard, Dominic Cooper, Rosamund Pike, Alfred Molina, Cara Seymour, Olivia Williams, Emma Thompson. Director: Lone Scherfig.

A star is born. Twenty-four-year-old British actress Carey Mulligan positions herself as a serious Oscar contender with a mesmerising portrayal of a conflicted schoolgirl in Swinging Sixties London.

Based on a memoir by journalist Lynn Barber, An Education is a rites of passage story blessed with a touching and humorous script by Nick Hornby (High Fidelity, About A Boy).

Director Lone Scherfig beautifully evokes an era of mini-skirts, bouffant hair and childish innocence.

She delicately handles the heroine’s sexual awakening, mining a rich vein of humour in scenes between the girl and her parents, whose desire for their little girl to do well at university threaten to suffocate her.

Twickenham, 1961: 16-year-old schoolgirl Jenny (Mulligan) meets handsome stranger David (Sarsgaard) on the street and is unsure how to respond to the attentions of the older man. When their paths cross again, Jenny nervously accepts an invitation to a classical music concert with David’s business partner Danny (Cooper) and his girlfriend Helen (Pike).

They gradually lead her astray with visits to late-night supper clubs and a trip to the country.

As a consequence, Jenny’s grades slip and her teacher Miss Stubbs (Williams) fears her best student is throwing her future away.

Still, Jenny is dazzled by her suitor – but not so much that she is willing to surrender to him, confiding: “I'm a virgin and I want to stay that way until I’m 17.”

As the milestone approaches, Jenny is torn between the hopes of her parents (Molina, Seymour) and her burgeoning desires.

An Education is an elegant and affectionate portrait of post-war conservatism as seen through the eyes of a precocious, yet painfully naive teenager teetering on the cusp of womanhood.

Mulligan’s tour-de-force central performance galvanises the film, striking the right balance between determination and vulnerability.

Scenes with Sarsgaard spark a simmering sexual chemistry that, once consummated, delivers a big laugh when Jenny inadvertently derides David’s sexual prowess by musing: “All that poetry and all those songs about something that lasts no time at all!”

American Sarsgaard’s shaky English accent is an unnecessary distraction.

He concentrates so hard on elongated vowels that at times, he almost forgets to deliver a performance.

Emma Thompson enjoys a memorable cameo as the school’s headmistress. At the end of Jenny’s journey of self-discovery, she notes: “You sound old and wise.”

A little wistfully, the teenager replies, “I feel old, but not so wise”, and we cannot help but smile with her.