The 22-year-old starlet says she can't think of any other actor playing Edward Cullen to her Bella Swan.
"I guess at this point, I can't really imagine it," Stewart told E! News yesterday while promoting Breaking Dawn Part 2.
"It's so obvious; it slaps you in the face anytime you meet somebody who you're like, ‘We definitely need to work together!'" she gushed. "We clearly are into this, maybe not for the same reasons, because he's a nut, but I knew instantly. With Taylor [Lautner] too. I take full and complete credit for those boys."
It's a good thing Stewart felt completely comfortable working with Pattinson, because, as all Twi-hards know, the two had to film some very intense sex scenes for the two Breaking Dawn flicks.
"[The director] Bill [Condon] kept saying that he wanted to make this one feel like you're very much inside of the experience," Stewart dished. "Like you're there, you're sort of a part of it, which is odd. But to do that we had to look directly into the camera instead of at each other."
So not the most romantic movie lovemaking?
"It was awful!" she joked. "I was like, ‘Bill, you're depriving me of this experience. We've been waiting for vampire sex! What are you doing?!'"