From an interview about the movie:
I’d do a couple of takes and sit down whilst they were resetting the camera, and I’d have one person on each gauntlet and another person on the helmet. Somebody would then put an air conditioning unit up the back of my armor, and people with fans were in front of me. We’d all watch for the assistant director to give the 30-second countdown before everybody had to put everything back on me. So it was exactly like a pit stop for a Formula One car....I had an unnaturally deep voice as a child, pre-puberty....It’s a tone of voice I inherited from my grandmother. My dad’s mother was a tall woman with a very deep voice