James McCartney

James — who’s 34 and has played guitar on two of his father’s albums — says John Lennon’s son, Sean, and George Harrison’s son, Dhani, are also interested. But he adds that Ringo Starr’s son, Zak, is not.

The younger McCartney is playing today at Liverpool’s Cavern Club, where the Beatles rose to fame almost a half-century ago.

He says it’s difficult living up to his father’s legacy. “I’m not sure if I can do that,” James told the BBC. “I would love to be equal to the Beatles — but even that’s quite tough.”