The song that plays over Mr. Gray and Lee at the end of the movie is "Chariots Rise" by Lizzie West. The original lyric is "What a fool am I, to fall so in love," but the director did not want to imply that Lee was being foolish, and asked if it could be altered. Because she wanted the song to be in the movie, Lizzie West re-recorded the line as "What grace have I, to fall so in love."
Two posters were made for this film, one showing leads James Spader and Maggie Gyllenhaal and the other showing a model from behind bending over. Gyllenhaal admitted that the model was not her but it was someone who was dating her ex-boyfriend.
The producers got a permit for the wrong park when Lee walks home. The producer on set had to distract the local law enforcement that showed up while the scenes were filmed.
Erin Cressida Wilson:
In a scene in Mr. Grey's waiting room, where there are three people waiting to see him, one of them is played by the film's screenwriter.