Brie Larson was keen to make sure she wouldn't be required to save the world in a swimsuit when she first signed on to play superheroine Captain Marvel.

The Oscar winner didn't like the traditional comic book images of the character that were posted on a wall when she first sat down with Marvel bosses as they were mapping out the upcoming blockbuster, and demanded clarity on what they expected her to wear in the film.

Marvel boss Kevin Feige tells The Hollywood Reporter, "If you look at the comics, the further you go back, the less clothes (Captain Marvel's alter ego) Carol Danvers seems to be wearing.

"Oftentimes it’s a one-piece bathing suit basically, with outrageous comic proportions... Brie pointed it out on the wall, and we went, 'Yeah... just so you know, that’s not what we’re doing'. She goes, 'OK, I didn’t think so, but I’m glad you said that'."

Brie tells the publication she hasn't regretted signing up for the huge role, insisting it has allowed her to talk about the empowerment of women.

"The very nature of this film means that I'm having conversations that I'd like to have about what it means to be a woman," she explains. "What strength looks like, the complexities of the female experience, female representation.

"It’s surprising and cool that my first giant movie, I get to be having those kinds of conversations. But that’s also why I’ve waited and been particular about what jobs I do."

The Room star admits Patty Jenkins' Wonder Woman movie gave her the push she needed to take on a role as big as Captain Marvel: "As a kid, I wanted to be an adventurer, I wanted to be a smart-ass, I wanted to get my hands dirty," she says, "but it wasn’t until being in the theatre, seeing Wonder Woman... I was like, 'Why is this making me cry so much?' I realised 'cause I hadn’t had that, and there was a kid in me that was like, 'Oh, my God. I can do that?'"