Ahead the release of ‘Captain Marvel’ this week, American actress Brie Larson revealed how she mastered the ‘superhero’ avatar. In the latest episode of ‘Jimmy Kimmel Live’, she talked about the amount of effort and training the role required. The 29-year-old actress gave a full nine-month rigorous training to get the character right. Larson also told that she agreed to the movie at least three years ago and was scared initially. In the movie, she is playing the character of a US Air force pilot Carol Danvers, who transitions into one of the universe’s most powerful heroes. After the release, Brie Larson will become the first woman to lead a stand-alone Marvel superhero film. ‘Captain Marvel’ will hit the theaters on March 08.