Trivia

Director Gus Van Sant originally planned to make this movie in the 1990s, with Robin Williams starring as John Callahan.

This movie is based on a true story about John Callahan, who wrote and sang the song which can be heard during the end credits called "Texas when you go."

Jonah Hill considers this to be the best performance of his career.

Rooney Mara and Joaquin Phoenix were dating during filming of this film.

In real life actor Joaquin Phoenix checked himself into rehab in 2005 to be treated for alcoholism.