Gerard Butler to be Hunter Killer?
Gerard Butler could find himself swapping from being a Machine Gun Preacher to a submarine leader.
The Scottish star is rumoured to be in talks to play Captain Joe Glass - an inexperienced submarine commander who ends up forming an alliance with a Navy SEALS team to rescue a kidnapped Russian president - in the action thriller, reported Variety.
Sam Worthington is tipped to be offered the role of the SEALS leader.
Antoine Fuqua will be directing the big-screen adaptation of George Wallace's novel Firing Point, with a release scheduled for December 2012.
Gerard, who next stars in Machine Gun Preacher, will next appear in romantic comedy Playing The Field and inspirational surfing drama Of Men And Mavericks.
Sam - who is set to reprise his Greek hero's role as Perseus in Wrath Of The Titans and Jake Scully in the Avatar sequels - has just completed his own surfing film Drift.