Paul Giamatti (John Adams) has signed on to co-star in Duplicity, directed by Tony Gilroy. He joins Julia Roberts, Clive Owen and Tom Wilkinson in the Gilroy-scripted film for Universal.

According to Variety, Giamatti will play an industrialist engaged in a fierce game of corporate one-upmanship against a rival titan, played by Wilkinson (who plays Benjamin Franklin in John Adams). Roberts and Owen play two spies-turned-corporate operatives who work on opposite sides but are having a clandestine love affair. Billy Bob Thornton had been in talks for the businessman role.

No word on when production begins.