George Lucas Directed Scene in Game of Thrones Season Premiere; Martin Starr & Rob McElhenney Cameos
George Lucas came to visit the set of Game of Thrones while they were filming the premiere episode, and directed the scene between Jon and Daenerys as they discuss Sansa's less than warm reception. Everyone geeked out and initially thought it was a joke that he'd be visiting.
Martin Starr (Silicon Valley) and Rob McElhenney (It's Always Sunny in Philadelphia) had cameos as Greyjoy guards who get killed in the season premiere.
It's not the first time Game of Thrones has intersected with It's Always Sunny. Years ago, Weiss & Benioff met McElhenney at a party and expressed that they were fans of the show. They've written an episode (S9's "Flower's for Charlie") as well as had cameos on the most recent season of It's Always Sunny as nameless lifeguards.