By Joshua Rich
January 31, 2007 at 12:00 PM EST

How come I feel dirty every time I have to write about Sienna Miller? I mean, she seems like a nice lady and a fine actress (she was particularly wonderful in 2005’s underrated Casanova). But with Miller (pictured, in Factory Girl), it just always seems to be about sex, sex, sex. This even though, as she made clear to EW last fall, she’s ready to be taken seriously as more than just Jude Law’s on-again-off-again fiancée. And you have to respect that.

Which makes today’s rumor, that Miller and her Factory Girl costar Hayden Christensen weren’t pretending when they shot a sex scene for their film, particularly unsettling—especially because it reeks of having been planted by a hyperactive PR machine trying to drum up interest in the Edie Sedgwick biopic, which opens in very limited release on Friday. My goodness, what a way to improve an actress’ reputation! As it turns out, Hayden probably didn’t hold Sienna like he did by the lake on Naboo, says TMZ, whose report quotes Sienna’s rep as denying the rumor.

But I wonder: Would this salacious tidbit really encourage you to see Factory Girl, or would it have the opposite effect? I mean, I suppose when I heard that Mickey Rourke and Carre Otis may have actually gotten it on in Wild Orchid, I got interested in that film. But, good Lord, I was 14 at the time. The jury may be out on me, but everybody else has grown up since then, right? Right?