Ryan Gosling sent Kirsten Dunst flowers as an apology after filming a scene where he had to violently yank her by the hair. Although Kirsten said he hadn't hurt her at all, he was "visibly bothered" by the scene.
The film's plot is loosely based on the real life case of Robert Durst and the disappearance of his wife Kathleen McCormack in 1982. Kirsten Dunst plays Katie Marks, who is based on real-life person Kathleen Durst.
Andrew Jarecki said that he wanted to make a movie that real-life counterpart Robert Durst could watch and have an emotional reaction to. Upon seeing the movie, Durst contacted Jarecki, wanting to give his view of the events depicted. The interviews with the normally reclusive Durst provided the basis for the documentary miniseries The Jinx: The Life and Deaths of Robert Durst (2015), which gained widespread attention for contributing to Durst's arrest in relation to the murder of Susan Berman (depicted as Deborah Lehrman in this fictionalized film). Kirsten Dunst revealed on the Late Night with Jimmy Fallon (2009) that Robert Durst, who is the real person that David Marks is based upon, visited the set of the film being made and watched from a distance.
Kirsten Dunst stated in interviews that this was her best performance ever. She also said that when she read the script, she felt the same way Jodie Foster did when she read the script of The Accused (1988).
The screenplay for this film was featured in the 2007 Blacklist--a list of the "most liked" unmade scripts of the year.