He said: "I rang up [the producer] and I said, 'I'm getting married and it's your fault actually'... I think for the final season he is so stressed that he's reached that peaceful level. I was like, 'You need to factor in a 'Game of Thrones' wedding by the way.' They have all got to be there so the whole thing has got to shut down."
Now the pair are set to tie the knot, Kit says he could never work alongside Rose again.
He explained: "I wouldn't be able to keep a straight face. Honestly, I was watching Sliding Doors with her the other day, and there's a bit at the end where John Hannah is pouring his heart out to Gwyneth Paltrow and she's lying dead. I turned to Rose and I said, 'I wouldn't be able to do that with you, because you would piss yourself.' She's a brilliant actor. Actually I don't want to work with her because she would just show me up again. That's why."