Armstrong-Jones, better known by his aristocratic title Lord Snowdon, led a hedonistic lifestyle of Caribbean holidays and celebrity parties with Margaret that epitomised the "Swinging Sixties".
They married in Westminster Abbey in 1960 after Margaret was persuaded to break off her relationship with RAF pilot Peter Townsend, who was divorced.
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Their union was very troublesome from the start, leading to a divorced in 1978 after Margaret embarked on a relationship with Roddy Llewellyn, a landscape gardener and playboy 18 years her junior.
Margaret died in 2002 after a lifetime of heavy smoking and drinking. Her mother the Queen Mother passed away a few weeks later at the age of 101.
Snowdon became famous for his celebrity portraits, including of Barbara Cartland, Laurence Olivier and J.R.R. Tolkien.
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