Those who have seen Sienna Miller’s sex scene with Star Wars actor Hayden Christiensen in the upcoming film Factory Girl say that it appears that the two actually had sex in front of the camera.

Those who have seen Factory Girl say the sizzling clinch is even saucier – and more revealing – than the famous are-they-or-aren’t-they love scene between Julie Christie and Donald Sutherland in 1973′s Don’t Look Now.

Unconfirmed reports have claimed Miller and Star Wars actor Christensen, who plays her folk rocker lover, were romantically involved off-screen as well.

Director George Hickenlooper told the newspaper: “Sienna and Hayden grew close during the filming. It was an emotional experience for all of us.”

Well if true that sure would beat Paris Hilton’s sex tape. Sienna Miller having sex on over 3,500 big screens all across the country while moviegoers eat popcorn and chug down cola.