Emilia Clarke says Kit Harington is like a "brother" to her - and that makes filming sex scenes together "ridiculous".
The 31-year-old actress befriended the actor, also 31, while promoting Game of Thrones, long before their characters Daenerys Targaryen and Jon Snow shared a scene together, and they like to tease one another while they're working.
Emilia said: "I'll tell him, 'Kit, stop being a dick - stop being so grumpy.' Like I would with my brother."
Season seven of the show saw the pair's characters become lovers - just as it was discovered they were actually aunt and nephew - and Kit admitted they have found the scenes "ridiculous" to shoot because both he and his fiancee Rose Leslie are such close friends with Emilia.
He told Vanity Fair magazine: "If you've known someone for six years, and they're best friends with your girlfriend, and you're best friends with them, there is something unnatural and strange about doing a love scene.