The difference between Gellar's new film The Grudge – in which she plays an American student living in Tokyo who's exposed to a supernatural curse – and movies like 1997's I Know What You Did Last Summer and Scream 2? "Cleavage," says Gellar (with costar Jason Behr at the Oct. 12 L.A. premiere of The Grudge). "You could not wear a turtleneck in those movies."