Showbiz Spy are reporting that Kristen Stewart went mad after being questioned about Robert Pattinson.

A reporter asked Stewart if she was dating co star Robert Pattinson.

Stewart reportedly stromed off telling the reporter “That’s none of your business.”

A source has said “Kristen went mad.

“She was very, very rude.”

It is well known that Stewart does not enjoy being the centre of attention as she told Grazia during an interview last year.

“My life has become like a ridiculous soap opera that seems real but you’re not quite sure.”

“You’re caught in this dilemma of wanting to be a normal person and knowing that if you do go out and have fun that it might turn out to be a big story.”