Since former Misfits star Iwan Rheon joined season 3 of Game of Thrones his identity on the show has been shrouded in mystery.

Readers of George RR Martin’s books may well have guessed the name of Iwan’s character, who’s simply referred to as ‘boy’ in cast listings. But will fans of the show who haven’t read its source novels be in for a surprise?

We caught up with Iwan at a special screening of new rom-com The Big Wedding (out in UK cinemas on 29 May), starring Katherine Heigl and Robert De Niro, at London’s May Fair Hotel and asked him what he thought!

Check out the video to see what Iwan had to say about torturing Theon Greyjoy, how cruel his character can get, whether he’s worse than sadistic King Joffrey, and he teases us as to when we can look forward to finding out his character’s true identity:

Have you seen our other Game of Thrones interviews? Check them out by clicking the links below:

• Missandei – Nathalie Emmanuel
• Talisa Stark – Oona Chaplin
• Pyp (2nd interview) – Josef Altin
• Barristan Selmy – Ian McElhinney
• Game of Thrones – Cast Panel at Wales Comic Con
• White Walker – Ross Mullan
• Marry, Murder, Make Out? GoT challenge with White Walker
• Lancel Lannister – Eugene Simon
• Marry, Murder, Make Out? GoT challenge with Lancel Lannister
• GoT Seasons 3 & 4
• Bran Stark – Isaac Hempstead-Wright
• Loras Tyrell – Finn Jones
• Hodor – Kristian Nairn
• Pypar – Josef Altin
• Podrick Payne – Daniel Portman
• Yara Greyjoy – Gemma Whelan
• Tywin Lannister (Charles Dance), Syrio Forel (Miltos Yerolemou), Jeor Mormont (James Cosmo), Pycelle (Julian Glover), Ygritte (Rose Leslie), Samwell Tarly (John Bradley), and Night’s Watch Bowen Marsh (Brian Fortune)