Comparing the film to their 2005 movie "Mr and Mrs Smith," Jolie said: "The first film we had a lot of fun because of the subject matter. And this film it's very heavy..."
"It's not really fun, but the pleasure is breaking through something together and pushing each other and getting to the other end of it and learning something about each other. So, that was good, but it wasn't easy. But he was wonderful."
Pitt echoed his wife's sentiments, saying the scenes were tough but he believes the pair worked well together, reports femalefirst.co.uk.
"It's not always a pleasurable place to be as far as the scenes are concerned. But we work so well together. We go home together and we get up and go to work together. It was a great experience, it really was," Pitt added.
The "Fury" actor says there was no chance of the couple bringing their work home with them as they had children, Maddox, Pax, Zahara, Shiloh and twins Knox and Vivienne, to look after.
"Well, six kids pretty much defines that. They need you," he told Access Hollywood.
