The 32-year-old, who gave birth to son Aleph in 2011, admitted she had misconceptions about motherhood prior to giving birth herself.
'I love being a mum, but it’s much more intensive work than being an actress – going to work feels like you’ve got a day off,' she revealed.
'Not that I want a day off from being a mum, it’s just perhaps I had this impression before that mums don’t work. But they work more than anyone.'
The Black Swan actress stars as astrophysicist Jane Foster in upcoming film Thor: The Dark World.
Speaking about playing the roll of a strong, 'kick-ass' woman, the mother-of-one explained:
'I want every version of a woman and a man to be possible. I want women and men to be able to be full-time parents or full-time working people or any combination of the two.
'Being a mum is much more intensive work than being an actress'
'I want both to be able to do whatever they want sexually without being called names. I want them to be allowed to be weak and strong and happy and sad – human, basically.'
The vegan actress, who married her choreographer partner Benjamin Millipied, whom she met in 2009, one year after giving birth to their son, added:
'The fallacy in Hollywood is that if you’re making a "feminist" story, the woman kicks ass and wins. That’s not feminist, that’s macho. A movie about a weak, vulnerable woman can be feminist if it shows a real person that we can empathise with.'