I can't impersonate someone. That is not what I do. I can only take someone's essence and create a character out of that.
When you film in Africa, it's almost like a character in and of itself because it is so beautiful and has this special magic that I've never experienced anywhere else. There is something so incredibly beautiful about the light.
What interests Sam Mendes are characters and relationships, and he was a genius at giving you the freedom to create the type of character you want, and also to explore and have fun with your fellow actors. For him, characters and relationships are really the heartbeat of the film, and then the action is the backdrop. By developing the characters, he makes you care that much more about the action and going on a journey with the characters.
I always find filming stressful. I get very caught up thinking about my character - 'Am I doing it right? Should it be done this way?'