Hoy won six Olympic golds between 2004 and 2012 and is the third most decorated British Olympian of all time.
He retired from cycling in 2013 and in recent years has been a regular pundit and commentator as part of Sport’s cycling coverage.
He had not previously disclosed the type of cancer.
But he told the Times that he had been diagnosed with primary cancer in his prostate, which had spread to his bones – meaning it was stage four.
Tumours were discovered to his shoulder, pelvis, hip, spine and rib.
Sir Chris told the newspaper: “As unnatural as it feels, this is nature.
“You know, we were all born and we all die, and this is just part of the process.
“You remind yourself, aren’t I lucky that there is medicine I can take that will fend this off for as long as possible.”
