Natalie Portman has revealed that she has no plans to go nude on the big screen.

The Other Boleyn Girl star has bared almost all in roles for Closer and My Blueberry Nights, but doesn't want to go the full hog.

"I'm definitely not a prude about sex or nudity, I just don't want do something that will end up as a screen grab on a porn site so meanwhile I'm doing halfsies - I'm like, 'I'll show my butt but not my boobs'," she told Elle magazine.

Natalie - who next stars in Brothers with Jake Gyllenhaal and Tobey Maguire - is proud of her 'good girl' tag.

"The good-girl image was something I consciously cultivated after Leon," she admitted.

"There was a lot of controversy about the whole Lolita thing. My parents were super-protective about it, but I got a lot of weird letters. It was really upsetting. I didn't want to be seen as a sex object, so I went the opposite direction."

The 28-year-old said she aspires to be like Hollywood icon Meryl Streep.

"You look at Meryl Streep, who is so phenomenally, freakishly gorgeous, and in some ways it's just bizarre that she was never a sex symbol," she said. "But it was always about her - and now it doesn't matter that she's getting older, because we just want to continue watching her be an interesting person. Whereas you see actresses who marketed themselves on their bodies, and they might be good, but over time they just lose it because that sort of thing doesn't last."

Brothers is released in cinemas on January 22.

The full interview and shoot appears in the February issue of UK Elle, out January 6.