Who's Who In Fifty Shades Of Grey [Pictures]

E.L. James' bestselling trilogy Fifty Shades of Grey has become a cultural phenomenon since the publication of the first instalment in 2011. The trilogy is being adapted into a series of films which, despite the first tame poster released yesterday by Universal, promise to be as risqué as the books. 

E.L. James wrote the Fifty Shades trilogy, the first of which was published in 2011.

Although the trilogy has sold in their millions, for those of you who need a refresher or simply haven't read the books, here's a quick outline of the characters involved and the actors who will play them in the upcoming film.

Fifty Shades of Grey is due to be released on 14th February 2015.