McCartney, often nicknamed Macca, will be making a guest appearance on Starr’s upcoming album, and the pair released pictures of themselves working in Ringo’s home studio over the weekend.
Starr thanked his former bandmate on Twitter: ‘Thanks for coming over man and playing great bass. I love you man – peace and love.’
It’s the first time the duo have worked together in seven years.
Back in 2010, McCartney played bass on Starr’s track ‘Peace Dream’ and contributed vocals to ‘Walk With You’.
Starr revealed that Eagles guitarist Joe Walsh had also ‘came out to play’ and joined them to work on the follow-up to 2015’s Postcards from Paradise.
Bruce Sugar, who is producing the album, posted a photo on Facebook of himself with McCartney and Starr.
He captioned it: ‘Magical day in the studio today with these two’.
Now we just need them to sort out a Beatles reunion tour…