Paul went on to explain why he named his album McCartney III. Out now: The Beatles star, 78, releases McCartney III this week, having written and recorded it during lockdown earlier this year Process: In a BBC chat with actor Idris Elba, aired on Saturday night, the crooner admits he 'didn't realise' what he was creating when he did it 'I realised, because I played them myself, I'd done McCartney I and McCartney II in the same vein, that this would be McCartney III. So then it was like, ok, I see what I'm doing now.' During lockdown, Paul stayed in the countryside with his daughter Mary and her children.