We know who’s playing the Fab Four in Sam Mendes’s quartet of biopics, and we know (more or less) who’s playing their partners. But who's playing Bob Dylan? Or George Martin?

Paul McCartney’s solo career has seen him revisit countless Beatles songs over the years, from early hits such as Love Me Do and Eight Days A Week to late-period classics such as Let It Be and various elements of the medley that closes Abbey Road.

When it comes to making movies together, Matt Damon and Ben Affleck will continue to let it be. The Bourne Identity actor, who has collaborated with his longtime friend on more than a dozen projects, was inspired to continue working with him after watching ...