Filming for the hotly-anticipated eighth and final series wrapped last year, and with the first episode about to air, the cast are busy promoting the show – while doing their best not to reveal any plot details.
However, Kit has revealed that he’s already blabbed about what’s to come to one friend, telling them exactly how the series will end.
Appearing on tonight’s Graham Norton Show, he explained: “The intensity of finishing something like this and not being able to tell anybody is so hard.
“It got too much, so I’ve told one person – my friend James, who doesn’t watch the show and fell asleep in the first episode of the very first season.
“I knew then that he was zero interested in what I do. We were having a drink the other night and I told him everything about how the series ends, and he couldn’t have looked less interested if he tried!”
Given that Sophie Turner’s fiancé Joe Jonas had to sign a non-disclosure agreement after spending so much time on set, we wouldn’t be surprised if bosses are cornering this friend as we speak.
Kit also told Graham what life after GOT has been like, revealing that he’s found it all pretty emotional.
He said: “I was determined to be cool about the end and decided that when people came up to me and said, ‘Are you Jon Snow?’ that I would say very calmly, ‘I used to be’.
“When I left the set for the final time I was very emotional, and when a girl came up to me and asked the inevitable question, I broke down and cried, ‘I used to be!’ She backed off pretty quickly.”
The first episode of Game Of Thrones will be simulcast in the US and the UK, getting its debut on Sky Atlantic at 2am on Monday 15 April. It will then be replayed on the channel at the more convenient time of 9pm.
The Graham Norton Show airs tonight on BBC One, at 10.35pm.