Antony Armstrong-Jones, photographer, designer and film-maker, gained worldwide attention when he married Queen Elizabeth II's younger sister, Princess Margaret in 1960-the first non-aristocrat to marry into the Royal Family for 400 years.

How did a 'commoner' come to marry a princess, a woman whom he had long admired from afar?

In fact, 'Tony' descended from Welsh gentry, the son of a barrister and a society hostess. His family shared a long-established link with the Mountbatten arm of the Royal Family.

In this engaging biography Helen Cathcart traces the first four decades of Lord Snowdon's life, from the child of divorce and schoolboy victim of polio, to successful photographer of the rich and famous and dutiful member of the Royal Family. Cathcart draws on close personal family sources to reveal the man behind the camera, the Old Etonian whose sense of timing and inquisitive interest in people made him one of the most original of British photographers. Cathcart also tells the definitive story of Lord Snowdon's romance with Princess Margaret and their early married life together as one of Britain's most glamorous couples.