Sir Paul McCartney is in a yoga group with Alec Baldwin

Paul said: "We have this little thing with Lorne, Alec, and a couple of mates. It's called The Yoga Boys, and we do yoga together, and we're terrible!"

He also revealed that he has adopted Alec's approach to rejecting pictures in public.

Paul explained: "I don't like to take pictures. When people say, 'Can I have a picture?' cause everyone's got a camera (on their phone)... I say, 'I'm sorry, I don't do pictures.'"

The 78-year-old musician continued: "We were sitting around afterwards, talking and we're having a bite to eat outdoors. Someone comes up to Alec and says, 'Can I have your (photograph) with Sir Paul?' He looks, with that Alec look, and says, 'I'm sorry, I don't do pictures.'

"He held it and I just thought, 'That's the line!'"

Paul revealed that he would rather sit and have a chat with a fan and feels like a "monkey" when he asked to take part in a photo opportunity.

He told the Smartless podcast: "I sometimes feel like I have to say, 'Look, I'm happy to talk to you, sit down, we can talk' – I like that, cause I'm still me.

"The minute I put my arm around you, you put your arm around me, I feel like the monkey in St. Tropez – 'Come and have your picture taken with the monkey!' and I don't like that, it puts me off."

McCartney quipped that the coronavirus pandemic has had a positive side as he can walk around relatively incognito in a face mask.

He joked: "The one good thing about the virus is everyone's got masks."