Here is what Rami had to say about being in Breaking Dawn:

“My brother was like, We’re going to have to change the locks and put bars on the windows! But I thought about it for a minute and thought, Here’s a role I can look back on and say, Man, I played a vampire, in, like, Twilight. I mean, how many people get to do that?”

Source: Rami-malek via Gossip_Dance