Billy Connolly will continue to perform on stage and screen despite undergoing surgery for prostate cancer and being treated for the "initial symptoms" of Parkinson's Disease.
The 70-year-old star, affectionately known as the Big Yin, started his showbusiness career as a folk singer before developing the stand-up act that made him famous and led to a career in television and film.
His spokeswoman said: "Billy Connolly recently underwent minor surgery in America after being diagnosed with the very early stages of prostate cancer. The operation was a total success, and Billy is fully recovered.
"In addition, Billy has been assessed as having the initial symptoms of Parkinson's disease, for which he is receiving the appropriate treatment.
"Billy has been assured by experts that the findings will in no way inhibit or affect his ability to work, and he will start filming a TV series in the near future, as well as undertaking an extensive theatrical tour of New Zealand in the new year."
He went on to perform sell-out stand-up shows around the world, present a series of documentaries and become an in-demand character actor with roles including starring alongside Judi Dench in Mrs Brown and playing a dwarf warrior in the forthcoming Hobbit movies.
He is married to New Zealand-born actress and psychologist Pamela Stephenson, whose biography of her husband, simply called Billy, was a huge best-seller.
He is one of around 127,000 Britons with the disease, which is caused by a loss of brain cells that produce a chemical messenger called dopamine.
Symptoms differ from case to case but often include a tremor or fine shake while the person is at rest, rigidity of muscles, slowness of movement and unsteady balance.
Other possible symptoms can include memory loss, and earlier this year Connolly admitted he had started to forget his lines during performances.
Speaking about it, he said: "This is f****** terrifying. I feel like I'm going out of my mind."
There is no cure for Parkinson's and scientists have been unable to work out why people get the condition.
Connolly was made a CBE in the 2003 Queen's Birthday Honours and awarded the freedom of his home city in 2010.