Kristen Stewart ''hates'' girl power films.

The 22-year-old actress enjoys portraying physically and mentally strong characters and she was excited to play Snow White in her latest movie 'Snow White and the Huntsman' because her alter-ego has ''gusto and kicks ass''.

She told BANG Showbiz: ''I hate girl power movies, when the people you're rooting for are not girls. That's what I was attracted to.

''I've always wanted to find a role where I can challenge myself physically, I really like getting the opportunity to hurt myself for the job but what I loved was that Snow White is someone who has the gusto and kicks ass but she's not a dude. She remains, steady. I'm not built to be physically strong, you have to outsmart someone, you have to be physically and mentally quicker, you have to have a strong heart.''

Kristen - who stars as vampire Bella Swan in the 'Twilight Saga' franchise - was keen to play Snow White to ''push'' herself and she particularly enjoyed playing the character when she overcame fears within the storyline.

She added: ''Nothing is that simple. Every time Snow White has to do something and not be crippled by fear I'm into that, one of the things I wanted to do was see how far I could push myself.

''The reason they hire these big huge burly dudes to work on these movies is because it's hard.''