The cast of the Universal Pictures film Duplicity starring Julia Roberts and Clive Owen has gotten bigger. Both Billy Bob Thornton and Tom Wilkinson have joined the project. According to Variety, Duplicity was written and will be directed by Tony Gilroy.

The story is about rival pharmaceutical company CEO's (Thornton and Wilkinson) racing to corner the market on a clever idea that will earn enormous amounts of cash. Roberts and Owen will play the spies trying to get a win for their company.

Filming for Duplicity is scheduled for early 2008.

Duplicity was released March 20th, 2009 and stars Clive Owen, Julia Roberts, Tom Wilkinson, Paul Giamatti, Dan Daily, Lisa Roberts Gillan, David Shumbris, Rick Worthy. The film is directed by Tony Gilroy.