You're watching your kids playing football and you're not present. It's like the worst... it's horrible. I despise myself for it. I think it's a particularly male thing. Being present and in the moment with your kids is something a lot of men struggle with.

Gollum is Gollum - though in 'Lord of the Rings' he's 600 years old and in 'The Hobbit' he's 540, so he looks a little bit more handsome.

After 'Kong,' my knuckles have never recovered because I had to wear very heavy weights on my forearms and around my hips and ankles to get the sense of size and scale of the movement of the character You are telling your body that you are these things and that you're feeling these thoughts and that you're experiencing these experiences.

Performance capture is a tool that young actors will need in the next 10, 20 years. It's on the increase, as you say. It's not going away.

I don't see a difference between playing a performance capture role and a live action role, they're just characters to me at the end of the day and I'm an actor who wants to explore those characters in fantastically written scripts. The only caveat is a good story is a good character.

In a personal way, to do with family and the father-son relationship, in a kind of artistic way with regard to him being an art student. I also studied the visual arts at Lancaster University. I then decided to become an actor as he was becoming a musician. And then as an actor/performer, we have similar sort of interests - music hall and that whole world. So, there's a lot that I felt connected with.

My agent told me they were casting for the voice of Gollum. I hadnt read The Lord of the Rings, but I read the script and realized what an amazing role it was. I developed a voice for the audition tape, then met Peter Jackson and Fran Walsh at the auditions and fell in love with them both.