Kelly Marcel, the screenwriter on the adaptation of EL James' bestseller Fifty Shades of Grey, has said that she has been unable to watch the film because of "how different it is to what I initially wrote".

The Guardian reports that during an interview on Bret Easton Ellis' podcast, Marcel said that author James had "all of the control" and would not sanction changes to her dialogue.

She said: "My heart really was broken by that process, I really mean it. I don't say it out of any kind of bitterness or anger or anything like that. I just don't feel like I can watch it without feeling some pain about how different it is to what I initially wrote."

She continued: "I didn't want the story to be linear; I wanted it to begin at the end of the film, and for us to meet in the middle."

Marcel explained: "So you start with the spanking, and you have these sort of flashes that go throughout the film... I wanted to take the inner goddess out, and all of Ana's inner monologue...

"I wanted to remove a lot of the dialogue. I felt it could be a really sexy film if there wasn't so much talking in it."

She added: "When I delivered that script was when I realised that all of them saying, 'Yeah, absolutely this is what we want!', and, 'You can write anything you like and get crazy and artistic with it' - that was utter, utter ********. Rightly so."

"Erika [Mitchell, EL James' real name] was like, 'This isn't what I want it to be, and I don't think this is the film the fans are looking for'... Ultimately, Erika did have all of the control," said Marcel.