'Danny Collins' trivia and fun facts

Inspired by the story of singer Steve Tilston, who received a letter from John Lennon 34 years after the artist wrote it.

The pictures on the wall of Collins' house (around 10 mins in), are all pics from previous Pacino roles; The Godfather, Serpico etc.

The key song in the film is written by Ryan Adams, and the version playing in the background actually features Adams singing.