“Happy Birthday thoughts for @johnlennon – Paul,” McCartney, 79, tweeted alongside a black and white image of the pair holding guitars beneath their chins.

Then Paul McCartney asked to borrow a guitar. (MORE: Happy Birthday, Paul McCartney: 70 Iconic Images for 70 Years) The Quarrymen’s instruments were strung for right-handers; McCartney was a lefty.

Paul McCartney celebrates his 83rd birthday on June 18, and after more than seven decades of writing iconic songs and performing for millions across the globe, he's showing no signs of slowing down.