They were the first...but they certainly won't be the last.

Harry Potter stars Emma Watson and Daniel Radcliffe experienced firsthand all the pandemonium that goes along with filming a hit movie.

And now, the teens have advice for Robert Pattinson...who has skyrocketed to fame as the Twilight series' breakout star.  

"I wish Rob all the best, I hope he's doing okay . . . It's interesting to suddenly watch, cause I haven't seen Twilight, and to suddenly be able to watch another franchise go massive, it's really interesting cause I have no concept of what Potter looks like to the rest of the world because I'm so involved in it, and so to watch Twilight kind of explode globally has been fascinating."

Watson calls RPattz a  "very intelligent, nice, talented, good looking, [who] kind of had everything."

"You know, I'm not surprised that he's been successful, I mean, I'm surprised that it's quite got this insane. But, yeah, I mean I think he's a great actor."

Now Emma, if you had to choose...Edward Cullen or Harry Potter?

"Obviously, I'm gonna have to say Daniel, cause you know, he's just gorgeous and I have to keep it all in the family, I have loyalty."

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