Charlie Hunnam has revealed he would not be using a body double in his lead role as Christian Grey in the film version of EL James' best-selling erotic novel Fifty Shades of Grey.

The 33-year-old actor admitted that he is comfortable with shooting intimate scenes in the film with co-star Dakota Johnson, who plays Anastasia Steele.

"I'll never use a body double. I'm not worried," The Sun quoted Hunnam as saying.

The Sons of Anarchy star had previously revealed that he was prepared for the role because of the gay sex scenes he did earlier in his career.

"You know what, I had such a baptism of fire with regards to sexuality on camera at the beginning of my career," he told Associated Press, "I starred in the British channel Four miniseries 'Queer As Folk' where I played a young, gay character and there were some incredible, explicit sex scenes on that show. So I feel, and now I am 16 years older and more mature so I don't anticipate them being too much of a problem. It's like anything else, just an exciting challenge."

Hunnam, who has been dating jewellery designer Morgana McNelis since 2007, said it was little difficult for her to come to terms with him filming explicit intimate scenes with Johnson, initially.

"Of course, it's difficult being with an actor, you know?" he said, "She is required to share certain parts of me with the world that she wouldn't necessarily choose to do, but we have a great relationship and she loves me and wants to be with me and we've been together a long time now, and I think she understands and has come to terms with the fact that there are certain elements of me that she is going to have to share. This is an extreme example of that, but thankfully we do have seven and a half years of history together, so it won't be a big problem."

Meanwhile, it was previously revealed that the Fifty Shades of Grey film will release in the United States on 1 July next year. British visual artist and film-maker Sam Taylor-Johnson will be directing a script written by Kelly Marcel. Dana Brunetti and Michael De Luca (producers of Oscar-winning The Social Network) will work behind the scenes.