The 21-year-old beauty plays the woman caught between cops Josh Hartnett and Aaron Eckhart, who are investigating the real-life unsolved murder of a wannabe actress whose mutilated body was discovered in Los Angeles in 1947.
The blonde star retorts, "Of course it's nice to be considered sexy, as a young woman in my prime. But I try not to think about the sexiness.
"And I never think about it being distracting from a scene."
The Brian De Palma movie has its world premiere at the Venice Film Festival today.
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