Rob unhappy over 50 Shades of Grey movie role snub.

The cast possibilities for the 50 Shades of Grey Movie took an interesting turn recently with actor Robert Pattinson answering an earlier jab at him by the book's author E.L. James.

The fight seems on as the actor who plays Edward Cullen in the Twilight series said he can't believe her book is on the New York Times Best Seller list and said he would make her pay for dissing him for the lead role in the upcoming film based on the book.

The reason for the jab from Pattinson, even though James wrote the erotic 'Fifty Shades of Grey' trilogy based on Rob and Kristen Stewart's performances in the 'Twilight' franchise, she says he won't play the lead of Christian Grey.

Rob talked to author Talia Soghomonian about the snub.

He said, "I think the author has written me out of it. I saw some interview earlier and they went, oh, it could never be him."

And how does RPatz really feel about that?

"I'm like, 'Hey, I'm going to make you pay for that!'"

More news and gossip on Rob…

It has been reported that Robert Pattinson and Kristen Stewart have reunited for a trial.

The couple split during the summer when it was revealed Kristen had been cheating on Robert with her married 'Snow White And The Huntsman' director Rupert Sanders but it now appears as if Robert has forgiven her and is willing to move on.

A source told E! News the pair are definitely talking and have met up at two different locations in a bid to get their relationship back on track.

The couple have not been seen together in public since pictures emerged of Kristin kissing Rupert and the actress recently pulled out of a planned joint appearance with Robert at the MTV Video Music Awards.

Kristen, 22, recently insisted their off-screen drama won't affect their promotion of 'The Twilight Saga: Breaking Dawn Part 2' - the final movie in the vampire series they both star in - in November.

Speaking at the premiere of 'On The Road' at the Toronto Film Festival, Kristen said: ''We're going to be fine. We're totally fine.''

Kristen and Robert play on-screen lovers Bella Swan and Edward Cullen in the popular vampire franchise and the brunette beauty is determined she won't let her ''momentary indiscretion'' affect their professionalism or let their fans down.

She added: ''We have been waiting for this thing to be unleashed for so long. It was sort of one of those situations where you just have to put yourself in your body and go appreciate the moment.''

Us Weekly is now reporting that the two are shacking up together again as well, too.

(Image: WENN)