AceShowbiz -

Nicole Kidman goes brunette for Interview. The Aussie actress goes brunette for the cover of the magazine's November 2007 issue, which sees her poses alongside lookalike sister, actress Jennifer Jason Leigh.

In the interview session, Kidman reveals her feeling about her marriage to country singer Keith Urban, saying she never tells interviewers that she's happy, even when it comes to her marriage, because she never knows what tomorrow will bring.

Being asked if she and Urban are happy together, she replied "I don't ever say that. Partly because interviews are done in advance and you never know where something's going. People's lives together are complicated and beautiful and that's what they should stay. They're very quiet. Complicatedly quiet. They don't need to be broadcast."

However, Kidman went on clarifying, "My husband and I are committed to each other and deeply in love. That's how I would put it. We're working on staying in that place, and hopefully we will for the rest of our lives."

Being interviewed in the magazine by novelist Michael Cunningham, Kidman also told the magazine about such matters, as her years as a schoolgirl and what she thinks of Leigh.

Meanwhile, talk is heating up that Kidman has been told to pile on the pounds for her new movie "The Reader" because of which she has already put on 10lbs and is planning to double her weight gain in the coming weeks.