"As many of you know, my mother, Christine Keeler, fought many fights in her random life, some fights she lost but others she won," he wrote. "She earned a place in British history but at a great personal price, we are very proud of who she was"
Platt told the Guardian that Keeler died in a hospital in Farnborough, a city in East London.  In 1961, Keeler was a 19-year-old cabaret dancer in London when she was introduced to John Profumo. He was the war secretary, around 40 years old, and a rising star in the government of Prime Minister Harold Macmillan.
Keeler and Profumo started an adventure while she was watching Yevgeny Ivanov, a Soviet military attache.
Profumo's relationship with Keeler came to light after police investigated an incident involving Keeler.
Initially, Profumo tried to appease the rumors of a love affair. He told members of Parliament in 1963 that there had been no lack of correction in his relationship with Keeler.
As the rumors spread, and more details were revealed, particularly the possibility that state secrets might have been exposed through Keeler's relationship with the Russian, Profumo confessed to his wife and then to the cabinet . He resigned that year.
Unable to contain the consequences of the scandal, MacMillan resigned months later. In the national elections that followed in 1964 the Tories were defeated by the opposition Labor Party, and its leader Harold Wilson became the next prime minister of the country.
While the scandal filled the newspapers and captivated the country, Keeler posed for photographer Lewis Morley. He created an iconic portrait of the seated brunette, apparently naked, sitting astride a chair. The photo became the defining image of the scandal.
A private life
Later, Keeler published several books, including a memoir entitled The Truth at Last, with the journalist Douglas Thompson. The book was updated in 2012, after the death of Profumo.
The Guardian reported that Keeler lived under the name of Sloane for many years and was married twice, both ending in divorce. She had two children.