Fifty Shades of Grey: 15 surprising facts

It's the film release everybody has been talking about and on Wednesday evening, Fifty Shades of Grey premieres in Berlin. The London premiere follows on Thursday before the thriller hits UK cinemas on Friday, ready for Valentine's Day weekend.

The hotly anticipated film, which stars Jamie Dornan and Dakota Johnson, is based on the first installmentof the book triology of the same name by EL James which originated as Twilight fanfiction and has sold over 100 million copies worldwide in over 50 different languages.

Ahead of the film's big screen debut this weekend, check out these 15 surprising facts you may not already know about the racy franchise which has taken the world by storm...