Rory Kinnear, who plays Beatles manager Brian Epstein, is the son of Roy Kinnear, who played alongside the Beatles in Help! (1965) and John Lennon in How I Won the War (1967).
Christopher Eccleston is, to date, the only actor to play both John Lennon and The Doctor (the Ninth) from "Doctor Who". However, Peter Capaldi (the Twelfth Doctor) played George Harrison in "John and Yoko: A Love Story" (1985), which starred Mark McGann, brother of Paul (the Eighth Doctor) as John.
Naoko Mori has confessed that she got drunk to film all the nude scenes in this movie.
"I can"t really remember much of that day. Maybe it was the half bottle of tequila. I've always sworn I"d never do nudity on screen," the Daily Telegraph quoted her as saying.
The real Yoko Ono is 7 years older than John Lennon; Christopher Eccleston, who played John Lennon, is 7 years older than co-star Naoko Mori, who played Yoko Ono.