Smith: (On his favourite part of performing on stage). All that freedom. You can be incredibly spontaneous moment to moment – whereas in TV and film you have to constantly watch what you're doing so that it matches in every angle. But film allows you to be incredibly intimate and real – you don't have to bump up your voice or your physical life in order to reach people hundreds of feet away. You can relax and be true to the situation, as if it's really happening for the first time.