By Jeanne Wolf, Photographs: Spicer

reezy? That's what Will Smith called Bridget Moynahan on the set of I, Robot, an action sci-fi blockbuster set in a future where mechanical creatures abound. Moynahan has the warmth, easy laugh and beauty that have had guys panting for her in The Recruit with Colin Farrell and The Sum of All Fears with Ben Affleck. She is recognized as the wife of Mr. Big on Sex and the City. And now she's taking on the role of a robot-friendly psychologist opposite Smith's tough cop, who suspects the machines may be bent on murder.

Those of us who have longed for some mechanical help to pick up the slack in our overcrowded lives may have second thoughts when the seemingly benign creations prove that artificial intelligence can also be willful and even humanly evil. Smith leads the skeptic patrol as Detective Del Spooner, who'd like to arrest a couple of robots. As Will puts it, he "yearns for simpler times." Bridget is the yin to his yang, playing Dr. Susan Calvin, who believes that robots do only good.

Moynahan's spark adds vitality to Calvin, who turns out to be a lot more than a cool scientist when the going gets rough and the metal guys get mean. As the plot of I, Robot gets scarier and more complicated, she literally lets her hair down and opens her mind to the unpredictable consequences of counting on mechanical beings to follow their built-in instructions.

VEGAS: You are truly Will Smith's equal partner in this film. This isn't just the girlfriend part.

BRIDGET MOYNAHAN: No, I'm finally not just the girlfriend. There's no chance of him leaving me. It's unbelievable, right?

Not only that, the guy is superstar Will. Had you ever met him before?

No. After I had sort of passed an audition I met Will for tea just so he could see who I was. It was really smart on his part because you end up being together shooting this kind of action movie for a long time. We shot for six months and you want to know that you're going to get along with your leading lady, you're going to have fun, and it's not going to be a headache.

Obviously you passed the test and Will knew you were the kind of girl he'd want to spend six months with. What was your personal reaction to him?

He's a superstar but just so nice. He doesn't let it all get to his head, and he treats everybody with the same level of respect, which is a great, great lesson to learn from him.

How would you describe your relationship on-screen?

They have very different views at the beginning of the film. He's a detective who hates robots and doesn't trust technology. He's sort of an old-fashioned guy in a futuristic world. My character is a psychologist who actually likes robots more than people. She creates them and feels that they can better us and help improve the human race. But as the story progresses she discovers some unsettling things that change her perspective.

But they didn't give the two of you even one love scene?

No, a little sexual tension is here but no passion. The movie's not about that.

Off-screen Will is a funny guy. So were you able to keep up?

I didn't make that boy laugh half as much as he made me laugh. My stomach muscles were so tight by the end of that movie just from laughing. And Will does it for the entire crew. Literally hundreds of people were working on the set and he had everybody in stitches ...

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