While Brie Larson has long been recognized as a very strong talentby those who saw Short Term 12 in particular–Room really allows her to show the valid extent of her acting chops. Not only did Larson believe the physical challenges of portraying a woman abducted and held captive in a confined space for many years (and filming in that tiny space),but she also had to acquire the then eight year-old Jacob Tremblay into her moral-hand man. Tremblay plays Jack, the son of Larson's…
Source: deadline.com