The Beatles stars Paul Mescal Joseph Quinn, Barry Keoghan, and Harris DickinsonThe main cast for Sam Mendes’ four intertwining films about The Beatleshas  finally been unveiled – and people think they’ve already worked out another huge British star who could be putting in an appearance.After months of speculation, it was confirmed that Harris Dickinson and Paul Mescal will be playing John Lennon and Paul McCartney in the new biopics, all of which are due to hit cinemas in April 2028.Barry Keoghan will be playing the game-changing pop group’s drummer Ringo Starr, while