But he can't give anything away!
With Season 8 not far away, Game of Thrones star Kit Harington who plays Jon Snow in the hit HBO series, visited the Stephen Colbert show to talk about Game of Thrones, except he isn't allowed to talk about Game of Thrones.
But that doesn't mean Stephen isn't allowed to guess how it all ends.
So how did Kit manage to keep all the secrets of the 7 Kingdom? This is the greatest.
"You can say nothin' Jon Snow".