Alongside a photo of himself performing in front of a giant photo of Lennon, he wrote: “Celebrating the birthday of my wonderful friend and collaborator, @johnlennon - Paul [black heart emoji]”.
The 81-year-old musician recently revealed he and Shevell have very different evening routines because he finds her TV viewing “too exciting”.
He told his official website: “I get ready for bed and the last thing I do is read. Nancy will often look at a series at that time, but I think it’s not conducive to sleep because some of the things she’ll watch are a little too exciting, and the plot will keep you up all night!
“So I try to read biographies, which can be a little bit dry. After a few pages you yawn, the page goes fuzzy, so it’s light off and straight to sleep. I like that!”
McCartney is also considering taking up knitting.
He said: “I don’t knit, I imagine that would be quite cool, actually. Tom Daley knits and so does Michelle Obama, and I get why they do it; it must be a great release of tension.”
