Despite the book's notoriously erotic plot, Jamie admitted that the contracts in place mean there is no full-frontal nudity in the film, and he added: "You want to appeal to as wide an audience as possible without grossing them out.
"You don’t want to make something gratuitous and ugly and graphic."
Jamie Dornan as billionaire businessman Christian Grey
The two begin a relationship - but Anastasia soon realises that Christian may not be telling her the whole truth about his private life.
Speaking to The Observer, Jamie also revealed why he doesn't listen to critics of the book, saying: "Look, the film is not the book.
Dakota Johnson stars as Anastasia Steele
"It’s an adaptation, and Sam Taylor-Johnson is an artist as well as an award-winning film director. Look at her track record. And look at the film studios behind it. Universal. Focus. All I can say is, wait until you see it before passing judgment.
FIRST LOOK AT JAMIE DORNAN AS CHRISTAN GREY
"Sam is a very bright woman, so there might be some suggestive elements to it, but I haven’t seen it at this stage, so it is hard for me to say. I’m aware of what we shot, and it wasn’t as if we shot a film without any action."