Sienna Miller

The It girl proves she can act-seriously.

Illustration: Rob Kelly

In the new film Interview, Steve Buscemi (who also directs) stars as a journalist about to have a clichd sit-down with a very spoiled actress, a woman he describes as "more famous for who she sleeps with than anything else." The same could be said of Buscemi's costar, Sienna Miller. Is the British starlet dabbling in a little Method acting? "I did study at the Lee Strasberg institute," she says. But no, it's not the Method. Miller, 25, insists she's been—yup—misrepresented by the press, and that she's more than Jude Law's onetime appendage. With a bunch of films about to open—including Stardust with Michelle Pfeiffer—she'll finally have a chance to prove it. It should be said that there's nowhere to hide in Interview, a low-budget two-hander shot over nine nights in an obscene Manhattan loft. The story begins with the actress inviting the journalist up to her apartment, where they split a bottle of wine and then make out. We had to settle for a phone call from England.

Interview was shot in a massive loft. It's like real-estate porn. I could have watched the thing on mute.

I know, it's gorgeous. I'm actually friends with the guy who lives there.

Does he own the apartment?

No, he rents.

You lived in New York when you were 18. Where was your apartment?

I was kind of a gypsy then. I was a nanny on the Upper East Side. Then I moved to the Upper West Side and then downtown, near the Twin Towers. I had a friend who was a male model. He lived in a male-model apartment on Maiden Lane. I moved in for a month, and I was called the Maiden of Maiden Lane.

A male-model apartment? What is this, Zoolander?

There were six of them. And it was funny because there were only two bedrooms with bunk beds and then everyone else slept on sofas. But because I was the Maiden of Maiden Lane, I got my own room.

Um, you and six male models...

I wasn't seeing any of them! When I needed the bathroom, I got my bathroom time. And I'd cook them shepherd's pie at night. I lived in six addresses over three months. It was mayhem. It was soul straightening.

You're quite good in this film, though I'm surprised you took the role. One of the lines is, "She's more famous for who she sleeps with..."

There's a kind of witty irony to sending myself up in that way. The media decided that I am some party girl who was a famous person's girlfriend, who parties too much and doesn't take her work seriously. Anyone who I've ever worked with—or will ever work with, I hope— knows that I've never been late for work. I take my work incredibly seriously; I'm actually quite homely and boring.

Here, we would say, "homey"... What's it like to kiss Steve Buscemi?

Fantastic! Mr. Pink is genius! Even Con-Air was genius.

You played Edie Sedgwick in Factory Girl. There was talk that a sex scene with Hayden Christensen was, well, an actual sex scene.

The fact is, if someone watches a love scene and thinks it's real, then you've done your job. In my opinion it was a little gratuitous, and bizarre—I mean, I had fights with the producers and directors about the way it was finally edited. And I think it was too much, personally. But I'd rather not see a sex scene where a woman leaves her T-shirt on.

I hear you're doing a fashion line. Let me guess: A fragrance is next. Sienna...for women.

I'm not about to launch a fragrance and a record, and I'm not bankable as a brand—or reliable enough—because I have a big mouth. I think celebrities do clothing lines as a fast track to making money. But we're not having a massive launch. It's not one of those "queues-around-the-block, let's-create-press-mayhem" things.

So what is it, then?

It's a small label I set up with my sister, who designed for Alexander McQueen for two years. She went to Saint Martins, which is probably the best design college in the world. The line is called 2812.

What's 2812?

It's my birth date. So everyone remembers my birthday.

Interview opens Fri 13.