In the 1970s there was a pretty English girl-next-door who truly personified the word 'glamour'. Her rise to the top was meteoric, controversial and scandalous. She became the most famous pin-up of the decade, and her racy reputation could shift a million newspapers and sell the longest-running British movie of all-time. Her name was Mary Millington - Britain's only genuine sex superstar. Mary's incredible fame brought her a lavish lifestyle and an affair with a serving Prime Minister. Her sexuality was accessible, and her personality addictive. But Mary's sexual bravado hid a darker side. Persecuted by the authorities, Mary was tortured by self-doubt and she died at the height of her fame in August 1979. She was just 33. Shot on location in London, and at the legendary Pinewood Studios, Simon Sheridan's enthralling documentary 'Respectable: The Mary Millington Story' reveals the truth behind a British icon and speaks to those who knew her best. Actor Dexter Fletcher narrates a story stranger than any fiction - of lost innocence, sex, fame, fortune and, ultimately, tragedy.