Mark Strong has joked the script for his new film about the hunt for Osama bin Laden is so top secret it self-destructs.
The Tinker Tailor Soldier Spy star plays the head of the Afghan Pakistan division of the CIA in The Hurt Locker director Kathryn Bigelow's controversial new film about the tracking of the Al-Qaeda founder.
Mark said: "It's so top secret that when they give you the script, if you don't read it for more than five minutes, if it doesn't detect movement in your computer, it all goes blurry!"
The British actor, who has already begun filming on the project in India, said it was an honour to work with Kathryn.
He said: "Kathryn Bigelow is extraordinary. The only woman [director] ever to have won an Oscar. I think only four have ever been nominated so she's a very special person."