Gillian Anderson says hello to a new baby - and a new X-Files movie.

It's 3 o'clock in the afternoon, and Gillian Anderson can't believe that her 18-month old has been napping for three hours. Babies are a major theme in Anderson's life these days. At 39, the actress is expecting her third child (she also has a daughter, Piper, 13), and she's guessing that, at about four months pregnant, she'll be slightly wider when she walks the red carpet next Friday for the premiere of The X-Files: I Want to Believe. It's the much-anticipated follow-up to the 90's sci-fi TV series that turned Anderson - and her small-screen alter ego, FBI Agent Dana Scully, along with David Duchovny as her partner, Special Agent Fox Mulder - into a household name.

In the six years since the series wrapped, Anderson has been living a decidedly un-Hollywood life in London. While Oscar - her baby with partner, businessman Mark Griffiths - sleeps, she opens up about her onscreen persona, pregnancy at almost 40 and Duchovny's bod.

Q. How are you feeling?

Great. I'm past that terrible first three months. They were debilitating. I don't recall feeling that bad with my other two children. It makes you wonder why you subject yourself to that over and over again.

Q. You were 24 when The X-Files started, and now you and Scully are almost 15 years older. How have you both changed?

I think she's a bit more mature, not only in the age sense. I may be completely delusional, but I feel just as goofy as I did back then.

Q. So who has aged better, you or David?

David's in even better shape than he was when he was doing the series. In the film, he has a scene where his shirt is off. I'm sure fans will be happy with that.

Q. What's it like gearing up for motherhood again at almost 40?

I started quite young, and my 13-year-old and I have a close, intense relationship. But there's something about having a bit more life experience behind me this time.

Q. You've been married twice before. Any interest in marriage again?

I don't feel it would improve anything. So why fix something that's not broken?

Q. You checked out of Hollywood and moved to England, where you lived as a child. Why?

I made a decision to move to a city that had less to do with the world of celebrity and Hollywood and more to do with the rest of the world.

Q. Scully was so serious. What's one thing about yourself that would surprise people?

I laugh a lot. I can be silly and funny and goofy.

Q. The movie's plot has been kept hush-hush, to say the least. Please tell our 50 million readers one thing that they won't hear anywhere else about the movie.

Mulder and Scully are not brother and sister. That's all I can say.

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Q. Why did you want to reprise the role of Dana Scully?
When the series was over, I was pretty adamant about saying goodbye and closing that chapter. But it was always a given that we would come back together some day, and the time was right.

Q. How have you and Scully both changed since we first met you?
I think she's a bit more mature, not only in the age sense. I may be completely delusional, but I feel just as goofy as I did back then.

Q. At 3, your brother was diagnosed with neurofibromatosis, a rare genetic disorder of the nervous system that causes tumors to grow. What impact has that had on your life?
My brother's diagnosis had a tremendous impact on our whole family. My mom started support groups and has been very intensely involved in the Neurofibromatosis Association and research. My celebrity enables [me] to say things that people might not listen to otherwise.

Q. Who are your heroes?
Right now I'm absolutely in awe of Barack Obama.