Despite the faked photos, Kit previously admitted the upcoming season is set to be "exciting" and "very different" to previous instalments.
He said: "This season is really different than any other season because it's accelerating toward the end, a lot of stuff collides and happens much much quicker than you're used to seeing on 'Thrones' ... It's so different than what everybody is used to. It's quite exciting."
Meanwhile, Kit's co-star Emilia, also 30, recently revealed that despite the season being cut from 10 episodes to just seven, the main stars actually get more screen time.
She said: "When I first read this season I thought, 'Damn, I gotta learn some lines! We're actually filming longer now. I don't know how that's happening."
Similarly, Peter Dinklage, who portrays the character Tyrion Lannister, said he too had more screen time.
He said: "I've worked more days this season than I have in quite some time."
But show runner Dan Weiss has explained how the increased demand for certain characters has lead to extra time on screen.
He said: "You kill a couple dozen characters, the people who are left by default need to carry more dramatic weight."
'Game of Thrones' seasons seven starts on Sunday (16.07.17) in the US, and Monday (17.07.17) in the UK and NZ.