Read them here: 1. Shailene Woodley and Brie Larson were the final two actresses in consideration for the lead role.
2. Brie Larson isolated herself for a month and followed a strict diet in order to get a sense of what Ma and Jack were going through.
3. In several interviews, the author of the book on which the movie is based has said the story is not based on any specific real-life case.
4. The film’s production designer, Ethan Tobman, wanted the final scene to include snow. It turned out that using fake snow would have meant going over budget, so the idea was scrapped. However, as luck would have it, when it came time to shoot the scene, it started snowing for real.
5. In Joy’s bedroom at her mother’s house, a show poster for the band Phantom Planet is out of focus in the background. Brie Larson is in a relationship with Phantom Planet lead singer Alexander Greenwald.
6. ‘Old Nick,’ the name of the antagonist in this film, is another name for ‘the Devil’ in Christianity, dating back to the mid-17th century.
7. One of the stories that Ma tells Jack is about the Count of Montecristo, whose main character was imprisoned in one cell for many years as well.
8. Brie Larson claimed that she avoided washing her face while filming in the Room, to really make clear on-camera that she was not wearing makeup.
9. Joan Allen and William H. Macy also appeared in Searching for Bobby Fischer (1993) and Pleasantville (1998) (in which they also played husband and wife).
10. Jacob Tremblay, though an experienced actor, could not bring himself to yell at Brie Larson in the scene where he is angry about his birthday cake having no candles. Finally the director had the entire cast and crew start jumping up and down yelling and screaming until he was able to do it himself.
11. Ma’s real name is Joy. Room is one of three movies released in 2015 and nominated for Oscars in which the lead is named Joy.
12. There are several subtle references to the fact that while they are still imprisoned, Joy continues to breastfeed Jack even past his fifth birthday–many years after the age when most breastfed children get weaned. Although this is not explained outright in the movie, it is implied that there are several reasons that she does this. First, it provides some extra nutrition and physical immunity for Jack. It is also a way of comforting him–taking care of him emotionally and adding to their bond–and encouraging him to go to sleep before their kidnapper arrives each night. Furthermore, it provides a modicum of natural birth control for Joy, who likely would have been loathe to endure another solitary and unsanitary labor in captivity or to place another child in the traumatic position that Jack is in. While in the source novel the captor required Joy to take birth-control pills after Jack’s birth, in the movie, the breastfeeding is the only explanation for how she was able to avoid having other pregnancies despite being raped nightly.
13. ROOM tells the extraordinary story of Jack, a spirited 5-year-old who is looked after by his loving and devoted mother. Like any good mother, Ma dedicates herself to keeping Jack happy and safe, nurturing him with warmth and love and doing typical things like playing games and telling stories. Their life, however, is anything but typical–they are trapped–confined to a windowless, 10-by-10-foot space that Ma has euphemistically named Room. Ma has created a whole universe for Jack within Room, and she will stop at nothing to ensure that, even in this treacherous environment, Jack is able to live a complete and fulfilling life. But as Jack’s curiosity about their situation grows, and Ma’s resilience reaches its breaking point, they enact a risky plan to escape, ultimately bringing them face-to-face with what may turn out to be the scariest thing yet: the real world.