Actresses Emma Watson and Amanda Seyfried have launched legal action on Wednesday after their private pictures were stolen and posted online. Meanwhile, former It girl Mischa Barton held a press conference, where she spoke of her anguish over a leaked sex tape. The photographs of Watson show her trying on outfits for a costume fitting. The pictures were accompanied by short videos of a naked woman in a bathtub the hacker claims are also Watson. a claim Watson vehemently denies. The images of Seyfried and Barton show them in a series of compromising and sexually explicit poses. All three women are threatening to take legal action against sites that host the explicit images.