Different actors have different ways of keeping their energy up. What you've got to do is try and maintain the same level of energy that your character has.

Zhaan is very still and very quiet, and as Virginia, I'm a bundle of energy all the time. Someone once said to me, I'm like a Labrador puppy. I get very excited and jump up on people. so for me to keep my energy as Zhaan, I had to keep very still and be very quiet.

Whereas Anthony Simcoe, who played Dargo, was always tap dancing and telling jokes. It was like he was like a stand-up comedian, which was fantastic because he kept us laughing the whole time, especially with Ben. Both Ben and Anthony needed to keep their energy at that level, so the second the director said "Action," they had that energy already ticking over in their eyes.