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Rooney Mara had to appear nude multiple times in the 2011 film 'Girl with the Dragon Tattoo,' but told Allure in their January 2012 issue that she just showed up, and was 'comfortable.'
'Nudity is such a huge part of the character in the book, so I never thought twice about it,' Mara told the magazine. 'There was no time for hesitation. I didn't have time to second-guess anything or be scared; I just showed up and was comfortable.'
(Pictured: Rooney Mara appears on the cover of W magazine's February 2011 issue. / Rooney Mara appears in a scene from the 2010 movie 'The Social Network.')
(W magazine / Columbia Pictures / Relativity Media)