In an interview with EW.com ask that is Jamie glad on Caius role? Jamie reveal that his first auditioning for the role of Demetri in New Moon. but they’re said he’s better as Caius!

“I was originally auditioning for the role of Demetri in New Moon, and then they said, “We think you’d be more fitting as Caius.” And I said, “Well that’s very kind of you, I’d love to come along and play him.” And I was aware of the character, I was aware very much of the particularly strong presence the Volturi have in Breaking Dawn.” Jamie added