Sam Mendes’s quartet of Beatles biopics are the cinematic equivalent of a distant asteroid headed steadily towards Earth. They’re a few years from impact—a 2028 release date is pencilled in—but when they hit, they’ll be big. Legendary playwright Jez Butterworth and Adolescence creator Jack Thorne are among the writers. Mendes, who is directing all four films, each told from the point of view of one of the Fab Four, has full rights to their life stories and the all-important song catalog. And he has a crack team of young stars playing the leads: Paul Mescal as Paul McCartney, Harris Dickinson as John Lennon, Barry Keoghan as Ringo Starr, and Joseph Quinn as George Harrison.

What about everyone else in the Beatles Cinematic Universe—the friends, lovers and collaborators? The band’s story has loomed over pop culture from the 1960s to the present; read any Beatles biography, and you’ll see they have Kevin Bacon-like powers of ubiquity.

Some of the supporting roles have been confirmed, or almost confirmed. As per reporting from Variety, Saoirse Ronan is playing Linda McCartney, Macca’s first wife; How to Have Sex’s Mia McKenna-Bruce will be Starr’s first wife, Maureen Starkey; while Shogun star Anna Sawai and The White Lotus’s Aimee Lou Wood are “circling” the respective roles of Yoko Ono and Harrison’s first wife, Pattie Boyd.

And James Norton, according to Deadline, is our first locked-in actor for all those “fifth Beatles” indispensable to the band’s success: he’s to play Brian Epstein, the band’s manager during their rise to fame until his death by overdose in 1967. That still leaves a lot of famous (sometimes very famous) faces to cast for. Here’s who we think Mendes should be ringing up.

Tom Holland as Eric Clapton

“I can’t do that. Nobody ever plays on Beatles records,” was Eric Clapton’s first response when George Harrison asked him to play guitar on “While Why Guitar Gently Weeps”. Eventually, he relented, and laid down one of the finest solos in rock music. Who to channel the charisma which eventually helped him woo Boyd away from Harrison, her then husband? Our Mr-Steal-Your-Girl has to be Tom Holland—not only a bit of a ringer for a young Clapton, but a man with enough star wattage to get across just how huge the guitarist was at the time.