Sir Billy Connolly has admitted he no longer shares a bed with his wife because his Parkinson's disease causes him to punch her in his sleep.

The comedian, 76, was diagnosed with the incurable disease in 2013 and announced his retirement from live performance five years later.

Sir Billy, who is cared for by his second wife Pamela Stephenson, 69 - with whom he shares three children, said he struggles with simple tasks including putting money away in his wallet.

He said: "It's like living with another guy, it's weird. My wife sleeps away from me because I punch her in the night.

"I recently went fishing in Utah with my son, and he said I was laughing and singing in my sleep. But the next night, I was fighting again - 'Argh, ya bastard'.

The Herald: Sir Billy Connolly

"I have to choose where I sleep and who I sleep with very carefully."

The Big Yin from Glasgow, who hasn’t performed on stage since 2015, revealed last week he “may do another gig” in the future but is not quite ready yet.

READ MORE: Billy Connolly reveals Glasgow gigs scared him the most

He added: "I'm OK today. I have bad days when I shake a lot and I can't put my money in my wallet.

"I know it's going to get worse, but I'll take it as it comes."

Across a six-decade career, Sir Billy, known affectionately as Big Yin, was known for his energetic stage presence.

Symptoms of Parkinson's disease include decreased mobility and difficulty speaking, leaving him unable to perform as he did in his pomp.

The veteran comedian also said he finds it "dead easy" to laugh about his illness.

Since his diagnosis, he has integrated the illness into his act, calling out the "symptom spotters", and entering the stage to Jerry Lee Lewis's Whole Lotta Shakin' Goin' On.

The comedian, who is still working on his TV shows, previously said he has “ to get used to all that and the way my legs move, the way I walk, the way I stand, the way my arms move.

“I have to get more used to all that before I consider going on a state and performing.”

In a documentary released earlier this year, Billy said he felt his life with “slipping away” as he battled the incurable disease.