Keeler's liaisons with Mr Profumo and Commander Eugene Ivanov, a Russian intelligence officer and the Soviet assistant naval attache in London had serious security implications.
It almost toppled the Conservative government, resulting in the resignation of Profumo as well as a series of criminal trials.
In a Facebook post, son Seymour Platt said Keeler died Monday at a hospital near Farnborough in southern England after suffering for many years from chronic obstructive pulmonary disease.
"There was a lot of good around Chris's rather tragic life, because there was a family around her that loved her." he said.
'I think what happened to her back in the day was quite damaging'.
Verizon's $300 deal off the Pixel 2 goes live online
The Pixel 2 with 64GB storage, which is now priced at Rs 61,000, is said to receive a flat discount of Rs 11, 001. The fingerprint sensor sits at the back of the device but, this time around the "glass window" is smaller.
The mother-of-two had recently been living under the name Sloane.
Keeler moved on after the scandal.
Mr Profumo assured parliament in March that year that he had not had an affair, but was forced to resign weeks later after it emerged that he had lied.
In June 1963, he quit in disgrace, amid allegations Keeler had been asked by Ivanov to discover from the War Minister when the West Germans might receive US nuclear missiles to be stationed on their soil.
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Ms Keeler wound up noticeably acclaimed as far as concerns her in the 1963 embarrassment, which shook Harold Macmillan's legislature.
Keeler was imprisoned for nine months after admitting perjury and conspiring to obstruct justice. "Some fights she lost, but some she won", he said.
'Far better that the Establishment be caught with its trousers down than involved in stealing secrets.
Do you remember the Profumo Affair?
That spring, Keeler and Mandy Rice-Davies - the showgirl who was also embroiled in the Profumo scandal - rented a flat in Talbot Woods in an effort to lie low. At another trial, the young dancer, when told that Lord Astor had denied having an affair with her, famously answered, "He would, wouldn't he?", a phrase that became engrained in British consciousness.
United Nations rights boss says can't rule out crime of genocide against Rohingya
He is urgently calling on the Myanmar authorities to put an immediate and absolute halt to the violence targeting the Rohingya.
Her life is the subject of a BBC series which will be filmed next year and outlines her upbringing in Uxbridge, Middlesex where she was raised by her mother and stepfather.