"Primrose Hill" describes a romance that began on the hill in Regent's Park that gave the London borough its name. The response online is huge: "What a joy to see these two familiar faces!" "Can we look forward to even more? Do Lennon and McCartney not only have a past but also a future? That would be a blast though.

Because " Primrose Hill" is really pretty. "I'm so excited to share my latest song, co-written by my good friend, @sean_ono_lennon," James McCartney said on Platform X. "Releasing this song feels like we're really getting the ball rolling," he added.