I think that celebrities should never underestimate their power. I mean just to draw attention, because then people get involved on a personal level.
Crossrail is a prime example of infrastructure. It is a rather deadly word, but I think it is exciting stuff, the civil engineering which makes Britain tick - the bridges, tunnels, power and water networks, which bind us together.
Quite frankly, I didn't become an actor to become a movie star. I have never dreamed about being the most famous person on the planet. I just want to do really good work.