Rob Pattinson "Doesn't Understand Girls" Dishes Twilight's Ashley Greene

Ashley Greene hasn't yet signed on for Twilight's Breaking Dawn, but the smoking hot vampiress is looking pretty fang-tastic on the cover of Seventeen magazine's June/July issue.

The 23-year-old actress was asked about her feelings for Rob Pattinson, and would you believe she says "the chemistry wasn't there." WTF? Ashley goes on to say:

"When I met Rob, I didn't think twice about him. He's really attractive... He also doesn't understand girls. He gets alot of attention from them, but he doesn't quite understand it because before Twilight, he was just a guy from Harry Potter."

As for the whether she's ever hooked up with co-star Kellan Lutz:

"I've definitely thought about it. He's one of my best friends, but if we were going to be romantic, we would have done it years ago! I like having him to talk to about other guys to get that male perspective. I really cherish our relationship, so I wouldn't want to mess that up by dating."