Fearnet has a great interviw with Jamie Campbell Bower
You play Caius, one of the three powerful vampires who rule the Volturi. But we only get to see you briefly, at the end of New Moon. Is it challenging to infuse your character with all of the back story and motivations that he has when you have limited screen time?
Jamie Campbell-Bower: Well, it wasn’t difficult because there’s so much back story, particularly to the Volturi. We all knew what we were there for, we knew what we were doing. You know, the thing about the Volturi is that they’re introduced in the second film and then come the fourth book, that’s where the meatiness lies. So it’s an introduction, effectively. But I wasn’t disappointed; I knew exactly what I was going to be doing when I got the script. I’m just psyched to be involved in it.
Read the entire interview here.