Rose Leslie played this absolutely perfect prank on Kit Harington at her fancy dress party

Kit Harington and Rose Leslie are clearly a couple who like to have a bit of fun with each other.

It was only a week ago that Kit revealed the absolutely brutal prank he played on Rose on April Fool’s Day during an appearance on Jonathan Ross.

The day has always been big in Kit’s family, but not so in Rose’s, so he decided to initiate her in the harshest way possible.

Thanks to being on Game of Thrones, Kit just happened to have an extremely realistic model of his own decapitated head lying around, you know, as you do. On April Fools’ morning, he decided to leave it in the fridge for his fiancee to find.

“It didn’t go down well,” Kit told Jonathan Ross. “It was far [from] the reaction I had hoped for. When my laughing died down, it took some making up… She pretty much told me if I did it ever again that would be it and I think that’s marriage included.”

But it turns out that actually, Rose gives as good as she gets. In an interview with Heat magazine, Kit has shed some light on how his former on-screen lover managed to totally humiliate him on her 30th birthday - and it’s a perfectly dastardly prank.

She bought a Jon Snow costume - not a good one from the set, but a cheap, tacky one from a fancy dress shop - and made him wear it for the duration of the fancy dress bash.

“She pulled out a Jon Snow costume, and Rose just whispered in my ear, ‘I won’t love you if you don’t wear it,’” Kit said.

“It was really embarrassing. The people bringing around canapes were looking at me, thinking, ‘You’re sad man! You’ve come to a party dressed as your character!’”

I am fully on board with this. I can’t think of many better ways to embarrass someone than by making everyone think they’re egotistical enough to dress up as their own character for a party. It’s pure evil and I love it.

The Instagram snap above shows Kit in his budget Jon costume, complete with fake sword and with Rose dressed as what looks like Hillary Clinton by his side.

The pair’s wedding will be during filming for Game of Thrones Season 8, but thankfully the cast have been given time off to celebrate the big day.

Kit told Jonathan Ross: “I rang [the producer] up 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 [the cast] have all got to be there so the whole thing has got to shut down.”

You can watch some f Kit’s Jonathan Ross interview below: