- The screenplay was originally set up in Boston.
A classic scene that took place on LA’s Griffith observatory was to be filmed at Boston’s Museum of Science according to the original screenplay. In fact Chazelle’s first feature film was also set up in Boston.
- Ryan Gosling is, in fact, playing the piano.
Composer Justin Hurwitz confessed that the piano sequences were first recorded by pianist Randy Kerber during pre-production, but Ryan then spent two hours a day, six days a week to play the piano sequences without the use of hand double or CGI.
- One of Mia’s audition scene is based on Ryan Gosling’ real life experience.
Mia’s Crying audition scene where the director takes a phone call and leaves the place is a real life incident of Ryan. He went to an audition where casting director answered a phone call and left the room.