The two surviving members of the Fab Four joined a host of celebrities including Madonna for the premiere of a new documentary charting their live gigs and meteoric rise to fame in the 1960s.
John Lennon’s widow Yoko Ono, and Olivia Harrison, widow of George, also attended the screening in London, which followed the world premiere in the Beatles’ home city of Liverpool earlier on Thursday.
The film, directed by Oscar-winner Ron Howard, features remastered footage of the band’s sell-out stadium concerts in America, which followed their early days playing in The Cavern Club.
Speaking on the blue carpet, Sir Paul told reporters: “We’re getting great memories obviously of playing with John and George.
“So that’s very emotional and very special to see that again.”
The band played their last big concert at Candlestick Park in San Francisco in 1966, and had their last live performance together three years later on the rooftop of their Apple Records headquarters in London.
Starr described their lasting fame as “beautiful”, adding: “People love the Beatles. We happen to be two of them and here we are.”
Mrs Harrison paid tribute to Howard’s work on the film, describing him as “a great storyteller”.
She said: “We were privileged to have Ron Howard making this film, he’s a great storyteller and I think he’s learned a lot too.”
She said it was “sweet” that some of the home movie footage is from her husband’s 8mm camera.