HBO Game of Thrones star Dean-Charles Chapman said he was not expecting his sex scene in season 5

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The 18-year-old star said he “wasn’t expecting” the love scene when he got the script, however when it came to filming the sequence he found it fairly easy to do. “It’s not awkward, it might look awkward on screen because of the age difference but it’s pretend, it’s all pretend,” he told Express.co.uk at a recent Game of Thrones press event.

Dean went on to say: “We’re actors, Natalie’s a lovely person, she made me feel unbelievably comfortable. Hopefully she was comfortable with me. But the sex scene and stuff, it all ran smoothly. It’s all planned, we talk about it, it’s a normal day.” Explaining how he approached the scene, he said that he just had to “take it as it comes”.

HBO Dean-Charles said Natalie Dormer made him feel very comfortable while filming the scene

We’re actors, Natalie’s a lovely person, she made me feel unbelievably comfortable. Hopefully she was comfortable with me. But the sex scene and stuff, it all ran smoothly Dean-Charles Chapman

The sex scene in season five was a cringeworthy watch for viewers due to the age gap between Tommen and Margaery - with the young Lannister king aged around 12 or 13 while his new wife was many years older. In real life Dean was 16 at the time of filming against his 33-year-old co-star. However, in the original George R.R. Martin novels, the scene did not take place because Tommen was only eight-years-old. Reflecting on the storyline he found most shocking, Dean teased: “There’s a lot in season six which I can’t tell you about, I wish I could. But for Tommen, I would say the sex scene. “I wasn’t expecting that and [creators] David Benioff and Dan Weiss as a joke came up to me and told me, 'Oh, we’ve done you a favour, we’ve written you in a cheeky little sex scene' and I was like, 'cheers’. That was the last thing I was expecting." But the thing that Dean found the trickiest was playing a character younger than himself: “That was the hardest thing for me. When it was published that I was going to play Tommen, all the fans of the books were like, ‘Oh, he’s turning 16’ - that was the hardest thing: to play younger and show that.”

HBO Tommen Lannister and Margaery Tyrell married in season 5 of Game of Thrones

Hailing from Essex, Dean has a strong accent but fans would never have guessed from watching him in the HBO fantasy drama. Dean admitted that the show had helped him to "master" Received Pronunciation, even though he had used it before. Prior to Game of Thrones, Dean played the lead in Billy Elliot the Musical, The White Queen and CBBC series The Revolting World of Stanley Brown. The rising star has been building up his CV since Game of Thrones with a variety of roles in shows including Ripper Street and the role in Glue last year, E4’s edgy new teen drama from Skins creator Jack Thorne. Speaking about his growing notoriety, he said: “I mainly get noticed when my hair is ginger and Lannister blonde, not so much now. I do get it sometimes but not as much as my hair when it’s blonde.”

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WENN Dean-Charles pictured at the world premiere of season 5 last year