Fifty Shades of Grey producers are to make two versions of the movie.

Based on E.L. James' best-selling book, the film will follow bondage-loving millionaire Christian Grey (Jamie Dornan) and his love interest Anastasia Steele (Dakota Johnson).

As well as a mainstream release, producers have announced that an X-rated version of the motion picture is also in production.

Speaking to movie news site Collider, producer Dana Brunetti, said: ''What we're kind of hearing from the fans is they want it dirty . . . they want it as close as possible [to the book].''

She added: ''I always thought it would be really cool if we released the R version [18 version] and then we had an NC-17 version that we released a few weeks later.

''Everybody could go and enjoy the R version, and then if they really wanted to see it again and get a little bit more gritty with it then have that NC-17 version out there as well. That is my idea, but the fans and the studio [Universal Pictures] will benefit from the double dip.

''We do not want this film to be seen as mommy porn - we want to keep it elevated but also give the fans what they want.''