Rose Byrne was six months pregnant during filming. The filmmakers used clever camera shots (such as medium to close up shots) and carefully placed accessories (like handbags and laptops) to conceal it in the film.
According to an interview with Yahoo program Build, during filming, Rose Byrne cut one of her index fingers clean off with a blender. It had to be surgically reattached.
To create the "classic" album that the character Tucker is best known for, director Jesse Peretz turned to previous collaborator Nathan Larson who worked with him on Our Idiot Brother (2011). Over the course of three years, they wrote songs and requested demos from about 35 artists such as Conor Oberst, Robyn Hitchcock and Ryan Adams. Nathan Larson's inspiration for the music was Big Star's "Third/Sister Lovers" album as well as friend Jeff Buckley.
It was announced in December 2014 that the novel would be adapted into a film to be directed by regular Girls director Jesse Peretz and produced by Judd Apatow, with Kate Winslet attached to star.
When they show old footage of Tucker Crowe, including one of his videos, it's on a show called 100 Minutes, a reference to MTV's 120 Minutes, which aired alternative music in the 1990s.
In Duncan's final video (during the credits), there is a copy of David Foster Wallace's Infinite Jest behind him. First, that novel inspires a number of fans who are as obsessed with Foster Wallace as Duncan is with Tucker Crowe. Second, those obsessed fans are often youngish to middle-aged men, much like Duncan.
Rose Byrne's funniest scene to shoot was the beach scene when Tucker and Duncan meet, as it involved a lot of improv and it was very windy.
The film involves musicians and fans. In real life, the director of the film Jesse Peretz is also a musician.