2. Watch: A music legend Ex-Beatle Paul McCartney gives an in-depth look into what went down when he and his bandmates wrote and sang classics. PHOTO: DISNEY+ Music icon Paul McCartney made a lasting impact on popular music with The Beatles back in the 1960s. In the recently released McCartney 3,2,1 documentary series, the 79-year-old gives an in-depth look into what transpired when he and his bandmates - Ringo Starr, and the late John Lennon and George Harrison - wrote and sang classics such as Let It Be and Yesterday. The six episodes, shot in black and white, feature McCartney's conversations with another seminal figure of rock music, producer Rick Rubin.