Ringo Starr is invited to "Le Cercle" gambling club, the same club where James Bond makes his first appearance in Dr. No. Coincidentally, both "A Hard Day's Night" and "Dr. No" were originally released by United Artists.
Ringo Starr was praised for his solo scene at the riverside as a forlorn soul. However, his expression in that scene was actually the result of being severely hung over after a previous night of heavy drinking.
Ringo Starr's answering a reporter's question "Are you a mod, or a rocker?" with "I'm a mocker" was voted as the #58 of "The 100 Greatest Movie Lines" by Premiere in 2007.
George Harrison stumbles and falls during the opening sequence of the group running down a street towards the camera. This wasn't intended and he ripped the suit he was wearing, but as he quickly recovered, laughed and continued running, it was decided to retain the shot in the film.
Paul McCartney's comment to the mirror in the dressing room "That this too too solid flesh would melt" is from William Shakespeare's "Hamlet", Act 1 Scene 2.
Paul McCartney's grandfather tells a policeman that he is "a soldier of the Republic". This is a reference to the IRA and shows the links to the Irish immigration to Liverpool. He quotes from the song, "A Nation Once Again" written in the 1840s by Thomas Osborne Davis (1814-1845), a founder of an Irish movement whose aim was the independence of Ireland.
John Lennon's line, "She looks more like him than I do" was dubbed in after shooting.
John Lennon's written answer to the female reporter asking him if he has any hobbies, is the word "tits".
Mal Evans, one of the Beatles assistants along with Neil Aspinall, makes a cameo in the film. He is the person carrying the upright bass/cello in between John Lennon and Anna Quayle (Millie) as they are talking in the hallway backstage at the television theater.
The Beatles first shared the bill with Wilfrid Brambell at the Royal Command Variety Performance in November 1963.
The Beatles record producer George Martin got an Academy Award nomination for his music score in the movie, but The Beatles themselves weren't nominated for their music.
Pattie Boyd (later George Harrison's first wife) appears in several scenes in the first act, all on the train. 1) She is one of the two "schoolgirls on the train" they first encounter 2) Paul McCartney chats her up with her friend. 3) She sits next to Paul and smiles and sings on "I Should Have Known Better".
A 'Bridewell' is an English slang term for a prison.
A young Phil Collins appeared in the audience during the "You Can't Do That" number though the sequence was cut from the film.
According to Norman Rossington, in the scene where John Lennon takes the scissors and cuts the tailor's tape and says "I now declare this bridge open", John improvised other versions where instead of "bridge" he would say "synagogue", "fish-and-chips stand", etc. The tailor in the scene is actually The Beatles' real tailor.
Another James Bond connection is the song, "This Boy" (a.k.a. "Ringo's Theme"), an instrumental version of which was used in the film to accompany Ringo Starr's solo scene. The guitarist was Vic Flick, who previously played on "The James Bond Theme" from Dr. No.
Besides Grandfather's gambling at "Le Cercle Club," there is other James Bond connections: Richard Vernon (the grumpy old man on the train) plays Smithers - the man who lectures Bond on gold in Goldfinger, and Margaret Nolan (girl at "Le Cercle Club") also appeared in that film, as "Dink", the girl at the hotel swimming pool.
In the scene where Paul McCartney's grandfather suggests Ringo Starr to be parading instead of reading a book, the book he's reading is "Anatomy of a Murder".
In the scene where The Beatles are running and playing in the field, John Lennon was not there. He was away promoting his new book "John Lennon: In His Own Write." A body double filled in for John, and close-up shots of him were edited into the scene later. A copy of the book can be seen on a mantelpiece in the background of a shot of Norm, Shake and Paul's (very clean) grandfather.
It was reported in contemporary press cuttings that 15 minutes was later cut from the film, including scenes involving a London double-decker bus. The Beatles autographed the ceiling of this bus, which was by that time privately owned by Tim Lewis of Twickenham. Many years later, in 1987, David Thrower purchased the bus in a derelict state, from Wicksteed Park, Kettering, and it is now fully restored to the condition it was in when used in the film - though the signatures of the Beatles on the ceiling are long gone, unfortunately.