Los Angeles: Brie Larson won the award for Best Actress in a Movie for "Room" at the 2016 SAG Awards on Saturday night.

It is her first SAG Award win. Larson beat out Cate Blanchett (Carol), Helen Mirren (Woman in Gold), Saoirse Ronan (Brooklyn), and Sarah Silverman (I Smile Back).

"I feel like I was born questioning everything about reality, feeling lost and alone and always worried that I was deeply unlovable," said Larson, accepting her award.

She added: "And watching your movies... made me feel less alone and made me feel like that was a safe place to explore my creativity."

She thanked her costars, including Jacob Tremblay, who plays her onscreen son, who she called her "inspiration." "Everything that is this movie is because of you," said Larson, as Tremblay smiled in the audience.

Larson won a Golden Globe for her work in the film and has also earned the Academy Award nomination for her role.

After learning of her Oscar nom, the actress said: "I thought, 'Holy s--t!' It's that, mixed with a total flat line. I didn't realize how strong my reaction would be. My whole body was shaking. I started crying."