The Collider interviewed Michael Sheen (Aro) about his upcoming projects:
So going into “Twilight: New Moon”, were you nervous about taking this role because you had already come from a franchise like that, or were you more excited for the role? What was your thought process and what was it like making the film with all the hubbub around it?
Michael Sheen: I was mainly excited about it because I knew I would make my daughter very happy. Up front, that was the main reason. And then I read the books and I really enjoyed the books. I didn’t think I was going to, but I really did enjoy them. Then I was concerned that the fans of “Twilight” would be like, “But he’s played a werewolf; we can’t have him as a vampire,” and all that. But it hasn’t been like that. And because it was a very different character and I could sort of lose myself in it, hopefully people won’t have a problem with me having been in this other werewolf/vampire franchise. So when I went to do it, I just loved the character. I relished the opportunity to be there and be part of it. Now I’m just very pleased to have a whole new generation of people I can scare.
Read it all and see the video HERE

haha. YAY! first comment. i think that Michael plays an excellent Aro as the trailers show us. it is exactly how i pictured Aro to be. Great character casting. looking forward to seeing him in New Moon, Eclipse & maybe, hopefully Breaking Dawn.
I adored him in the Underworld movies, and am very happy that he is Aro. I think he’s gonna do fang-tastic (lol had to do it…xD)
He is awesome and yes perfect as Aro. Loved him in Underworld too. He is a nice looking man. Can I start a Team Aro? LOL!!!