The rock legend made the revelation at a fundraising event on Saturday.
"No-one knows this, but I thought this was about time I told everybody. I'm in the clear, now, simply because I caught it early. I have so many tests," he said, according to The Mirror.
The 74-year-old was speaking at an event for the Prostate Project and golf's European Tour Foundation.
He joked to wife Penny Lancaster that he was going to use the evening to "come out", adding: "It's not what you think. Two years ago I was diagnosed with prostate cancer."
