Con Air writer Scott Rosenberg has joined Michael Bay's dark-comedy action thriller, Pain and Gain. The writer will touch up the script which was originally written by Christopher Markus and Stephen McFeely.

The story follows a pair of bodybuilders in Florida get caught up in an extortion ring and a kidnapping scheme that goes terribly wrong.

The project already has Mark Wahlberg and Dwayne Johnson signed on to star alongside Ed Harris, Anthony Mackie and Bar Paly.

Production begins later this month in Miami.