Although he is known as a fashion designer, Ford chose to leave the costuming in the film strictly to the costume designer. Not a single Tom Ford product appears in the film, as Ford "didn't want a commercial."
Aaron Taylor-Johnson was cast as Ray Marcus after Tom Ford had dined with Aaron and his wife and longtime Ford friend Sam Taylor-Johnson. Aaron did not think he'd be suitable for the part at all, but over the course of dinner Ford saw a glimmer of something that he found intriguing in Aaron's facial expressions as he recounted a story at the dinner table.
Isla Fisher revealed on NBC's "Today" that the 'hillbilly' night shoot in California's Mojave Desert lasted about 10 days and was such a grueling and emotionally-draining experience that she was thoroughly relieved when the film wrapped.
Art references in the film include; a Jeff Koons 'balloon dog' sculpture, a Richard Misrach photograph, a Mark Bradford piece (custom made for the film), an Aaron Curry sculpture and an Alexander Calder 'mobile' all in Susan's home; a John Currin painting in Susan's gallery office. Much of the work came from the director's private collection.
When Ray is sitting on the toilet outside his trailer you can see a bottle of shiner beer (specifically their popular brew "Shiner Bock") on the ground next to him. Shiner is brewed in Texas where the novel part of the film is set.
Amy Adams, Michael Shannon, and Jena Malone all appear in the DC Extended Universe in Man of Steel (2013) and Batman v Superman: Dawn of Justice (2016) with Adams appearing in further films and Malone appearing in the latter film in the "Ultimate Edition" while Aaron Taylor-Johnson appears in the Marvel Cinematic Universe with Captain America: The Winter Soldier (2014) and Avengers: Age of Ultron (2015).
The trivia items below may give away important plot points.
Tom Ford has established in interviews that the ending is intended to be interpreted subjectively by the viewer. Edward did not show up, either because he still loves her and it is to painful to see her again, or because she gave him the inspiration and strength that he needed to write his masterpiece and move on. It is up to the audience to decide that.