Charlie Hunnam & Dakota Johnson cast in Fifty Shades of Grey

After much speculation, the movie adaptation of literary phenomenon Fifty Shades of Grey has found its leads.

Charlie Hunnam and Dakota Johnson will be stepping into a big screen Red Room of Pain come August 2014.

While Hunnam has been a rumoured contender for leading man/sexy sadist Christian Grey for a while (insert your own Pacific Rimming gag here), Johnson is a relative, comparative unknown.

Best known for her work on sitcom Ben & Kate, she's also popped up in The Social Network and The Five-Year Engagement , and looks set to propel her into global stardom when she takes on the role of Anastasia - a sexually naive virgin who is introduced to the kinkier side of relationships when she meets S&M aficionado Christian.

Fifty Shades of Grey is set for global theatrical release 1 August 2014.