The 30-year-old actor revealed some candid details about his personal life and said he feels like he was “too young” when he first had sex.
Viewers of the fantasy epic will remember the King of the North’s first encounter with wilding Ygritte, who was played by Kit’s real life girlfriend Rose Leslie.
The two enjoyed a night of passion in a cave in season 3 episode 5 where Jon broke his Night Watch vow – oath of celibacy.
But Kit admitted: “Mine was a little less left-field than in a cave.”
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Kit Harrington revealed all about losing his virginity
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Kit Harrington’s girlfriend Rose Leslie played his on-screen love interest wilding Ygritte
“It was a typical sort of teenage thing, at a party. I was probably too young,” he told Elle Magazine.
He continued: “I think the girl and I just kind of wanted to. You either hold on and do it right, or you're young and decide to get the monkey off your back.”
When further questioned about the age, the interviewer guessed “13” and the actor claimed they weren’t “far off”.
The London-born star has spent a lot of his time filming the HBO series in Iceland and despite the isolation he confessed he “loves it” there.
He also revealed the cast and crew entertain themselves by playing board games and instruments.
Kit Harrington plays the King of the North on the Game of Thrones
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Kit added: “I play Risk. It's about conquering countries. It's basically Game of Thrones on a board game. It's Method.”
Fans of the drama are currently waiting for the seventh season which is expected to be aired early in the summer instead of its usual Spring slot due to the film needing colder conditions than usual.
Although official details on the next series are being kept under wraps, leaked images from the set of the HBO drama have shown that Jon Snow (played by Kit Harington) and Daenerys Targaryen (Emilia Clarke) will finally team up to take on the White Walkers.
Game of Thrones season 7 will air later this year.