Hoodwink is a product of his environment. He grew up in Belfast, he was part of the UDA and he fought for what he believed in - or was brainwashed into believing - because of the people that surrounded him.

But the first time I had to stand up and sing with them was when we did the pre-record for the movie and it was that moment where I sort of said to myself: "S**t, now I actually have to do this and I have to stand up and do my stars in your eyes moment!" Wake Up and Make Love With Me was the first song and I thought: "Here we are with Chaz and all the boys..."

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.

But I think there's something wonderful and extraordinary about climbing on your own and just that kind of relationship to the environment. I'm very addicted to the mountains. You know, so, I do like that solitude.

Working with people you adore and love. There's just a sense, all the way through all of the movies [Planet of Apes], that you're very rarely in a position where you have great material that you're passionate about and a big audience who love it, and the detail and nuance, and the exquisiteness of the fantastic actors and director with great writing.

Not a day goes by where I'm not reminded of Gollum by some person in the street who asks me to do his voice or wants to talk to me about him. But because 'The Hobbit' has been talked about as a project for many years, I knew that at some point I'd have to reengage with him.

I understand why people went nuts for 'The Artist.' We use words so much, it's nice to be able to explore a different way of communication, to be able to express silently what someone - or something - is thinking or feeling.