Mara, 30, said there are opportunities for actresses, and said complex female roles should have become normalised by now.
She said: "There are a lot of really interesting roles for women - definitely more than there ever have been. I think the thing to do is to stop talking about how there are not any.
"It should not be, like, 'Hey, this is great! These women are so complex!' Let's stop applauding that. It should just be normal at this point.
"Women are complex. In fact, I think, in a lot of ways, women are more complex than men."
Mara also spoke out against on-screen violence and said she was frustrated when she was advised not to agree to a poster for The Girl with the Dragon Tattoo which showed her exposed nipple.
"My agents were, like, 'You can't agree to this, you will not be able to turn back from this, you will not recover'.
"I was, like, 'F*** that, I do not care, I am doing it.' It is OK to show someone's head blowing up, but you are offended by my tiny little boob?"
- PAA