Jean Dujardin

I discovered that silent film is almost an advantage. You just have to think of the feeling for it to show. No lines pollute it. It doesn't take much - a gaze, an eyelash flutter - for the emotion to be vivid.

I can't speak American dog very well. There was a lot of improvisation with Uggie - like when I put the dog on the table or sometimes I follow him, sometimes he follows me. I had a lot of treats in my pocket. We worked with Omar Von Muller, the dog trainer. It was very easy because it was a big movie.

After decades spent in rewrite rooms surrounded by other shouting writers, I discovered that I work best alone. I like being in charge of my time, working out the problems according to my own rhythms and being able to nap. That's a big one, the napping on demand!