We all know that product tie-ins are a major part of pushing a new movie or TV series. They could be little action figurines, they could be kids pyjamas, they could even be replicas of something from the movie or TV series itself.

EL James, the author of the blockbuster 50 Shades of Grey trilogy is getting on in the act. Before you ask, no it's not a leather product tie-in for the book. Although, at this stage, anything's possible.

The author is, believe it or not, moving into wine-making and is offering lucky fans a chance to own their own bottle of 50 Shades-inspired Red Satin or White Silk. She's even gone on to say that it's a - wait for it - "natural extension" of her trilogy. Wow.

Remarkably, however, the wine doesn't come with the books. Which you'd think you'd need to get through one, let alone three of them. The movie adaptation recently announced its Christian Grey in the form of Charlie Hunnam of Pacific Rim fame. Stop sniggering. Meanwhile, the lead character of Anastasia Steele has been cast as Dakota Johnson, otherwise known as Melanie Griffith's daughter.

The movie adaptation of 50 Shades Of Grey is due for release in 2015.