For more than 50 years they've had a friendly rivalry, now a Beatles legend is jamming with the Rolling Stones.
Sir Paul McCartney has teamed up with the rockers, playing bass on a track for their upcoming album.
The collaboration comes after decades of tongue-in-cheek jibes between the bands.
Most recently, Macca, 80, branded the Stones a "blues cover band" in 2021.
The war of words began in the 1970s, when John Lennon called Mick Jagger "a joke", among other things.
Since then, Keith Richards has called Sgt. Pepper's Lonely Hearts Club Band "a mishmash of rubbish" and scoffed that The Beatles were "never quite there" when playing live.
Macca then said on radio: "I love the Stones, but The Beatles were better." Prompting Mick to brand him a "sweetheart", adding with a dig that The Beatles never managed an arena tour: "There's obviously no competition."
He also hinted at a potential collaboration, teasing Macca over his diss, claiming the rocker would "join us in a blues cover" during one of his gigs.
The upcoming album will be the group's first since the death of drummer Charlie Watts aged 80 in August 2021.
Charlie is set to feature posthumously on the record.
Macca recorded his parts in recent weeks.
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