Relax, Kristen Stewart: Katy Perry is no Twi-hard, and she's not hooking up with Robert Pattinson.

There are crazy fan encounters, and then there are crazy Robert Pattinson fan encounters. On Friday's Ellen, Pattinson, 23, tells Ellen DeGeneres about the woman who recently undressed for him in public during a marathon autograph-signing session.

"Twilight" director Catherine Hardwicke had to find out if Robert Pattinson would have chemistry with Kristen Stewart when she was casting the first movie in Stephenie Meyer's vampire franchise - so she brought them to her own bedroom.

Catherine Hardwicke isn't just the director who ushered Twilight into movie theaters in 2008: she's the woman who helped introduce Robert Pattinson to the world -- and to Kristen Stewart.

Shots of Robert Pattinson beat to crap were released but they turned out to be fake.

Robert Patterson told a story about four girls who had cut their necks to meet him.