https://www.youtube.com/watch?v=O5AAHrg8SQA

Brie Larson's critically acclaimed performance as years-long abducted mother Ma in the Lenny Abrahamson-directed film "Room" did not come together without some help and knowledge from various outside sources.

"I had to speak with a lot of experts, ones who could explain to me more about the sexual abuse and how that would affect the brain, and being in a confined space for seven years, and the lack of Vitamin D and the poor nutrition," the actress tells Made In Hollywood. "I had to sort of do as much as I could to understand it and be able to inhabit it, so that from the first frame of this film, it felt true."

But even once she got into her role and accepted the fate of her character, she realized there was still a long way to go to get through filming.

"It became an interesting exploration to see that although there is this big win of them getting out, it doesn't mean that the work is over," Larson explains. "Life is really complicated and there are lots of things in society that are complicated, and there are a lot of things here in society that are very difficult to adjust to."

One thing that got her through the intensity of the experience was her adorable costar Jacob Tremblay.

"He brings this beautiful perspective to the movie that is just light and innocence, and everything's quite easy for him and everything's very adaptable in the film," Larson says. "You can't lose yourself all that much when you have this brilliant 8-year-old right next to you who's constantly asking you to dance with him and sing Michael Jackson songs."