"Duplicity" is a terrific caper, but don't be fooled by the film's misleading marketing campaign. This is not the breezy romantic comedy the trailer makes it out to be.

You know how some couples thrive on contention in order to make their relationships work? These couples would have nothing on the lead characters in "Duplicity". In Tony Gilroy's complex corporate spy saga, Julia Roberts and Clive Owen play Claire Stenwick and Ray Koval, two lovebirds who are involved in a serious, high level corporate clash involving a secret formula that, when unleashed upon the world, could potentially earn it's respective company an obscene amount of money. Throughout the film, Gilroy plays with our perception of these sly individuals and asks us to figure out whose conning who.

At the surface, Duplicity feels a bit like a meshing of "Oceans 11" and "Mr. and Mrs. Smith", but whereas those two films were breezy, accessible entertainments, Gilroy's movie offers up a far more intricate labyrinth of double crosses and corporate insight. In fact, there are moments when "Duplicity" comes across as a little too smart for its own good. The film is a bit long and there were a few times when I felt like writer/director Tony Gilroy ("Michael Clayton") should have given the film a little breathing room. Having said that, this is still a winning combination of terrific star power and intricate corporate espionage.

Julia Roberts is a class act here, while her co-star Clive Owen brings swagger and a welcome sense of sarcasm to the picture. Together, Roberts and Owen provide quite the spark, and it's nice to see them playful and amusing, rather than secretive and vindictive (as they were in Mike Nichols' excellent but painful to watch "Closer").

"Duplicity" gets a big kick from it's outstanding supporting cast. Paul Giamatti and Tom Wilkinson are both terrific as rival corporate CEOs who will stop at nothing to beat one another to the punch. Their hilarious slo-mo fist fight at the beginning of the film perfectly sets what these men are all about. Carrie Preston is also terrific in a bit part as a gullible gal who succumbs to Ray's undeniable charms. She's simply adorable and makes the most of her limited screen time.

"Duplicty" is smart, sexy, and stylish and its also a shrewd indictment of the corporate mentality. Tony Gilroy's flash back and flash forward story technique will be tough for some audiences to follow, but overall, this is an amusing winner, particularly for those who have the patience to stick with it. And when you discover whose conning who, you might be surprised. I certainly was.