Beginning in 1973, Llewellyn, then aged 25, began an affair with
Princess Margaret, then 43. They had met in Scotland at the Café Royal in
Edinburgh in September 1973. Margaret's biographer Theo Aronson made this comment some years later, "He was well-mannered, well-spoken, and amusing; above all, he was very sweet-natured." In 1976, photographs of the couple in
Mustique led to a scandal. In the tabloids, he was referred to as her "toy boy". Llewellyn issued a public statement which said, "I much regret any embarrassment caused to Her Majesty the Queen and the royal family, for whom I wish to express the greatest respect, admiration and loyalty". According to
Anne Tennant, Baroness Glenconner, quoted in the 2018 documentary
Elizabeth: Our Queen, the monarch discussed Llewellyn with her after Princess Margaret's funeral in 2002. She offered Lady Glenconner thanks for having introduced her sister to him because "he made her really happy". On 11 July 1981, Llewellyn married Tatiana Soskin, a daughter of film producer
Paul Soskin. The couple have three daughters. ==Career==