First look! Check out Brad Pitt and Marion Cotillard's 'electric' chemistry in #Allied https://t.co/kpINoRo1tE pic.twitter.com/9rpt1hadQy— People Magazine (@people) August 3, 2016
08/03/2016 AT 10:00 AM EDT
Brad Pitt and Marion Cotillard are going back in time – and PEOPLE has an exclusive first look!
The stars play undercover allies who begin to develop a romantic relationship as they plan a high-profile assassination. Pitt plays a British intelligence officer sent to Casablanca on the mission while Cotillard plays a French Resistance fighter who poses as his wife.
And their chemistry was instant.
"Brad and Marion immediately had the utmost respect for each other, so once they delved into their characters, their chemistry was electric," the producer of the film, Graham King, tells PEOPLE.
The actors spent time together before filming started in order to hone their performances.
"It was crucial for Brad and Marion to not only begin rehearsing together before the shoot, but they also spent a lot of time developing their characters with the director, Robert Zemeckis," King says about the lead-up to filming. "By the time we got to set, it was really amazing to see these characters already feel lived in and real."
For more on Pitt and Cotillard, check out the new issue of PEOPLE, on newsstands Friday