So I've been keeping up with this.... interesting personality on Tumblr who is spreading all sorts of BTS rumors. The most egregious one so far is that Sara Hess wrote some stuff where Aegon anally raped Alicent and Discovery caught wind of it, brought in writers and producers to rewrite her stuff, and banned her from the set. Also, that Tom Glyn Carney told people about this scene at the GoT convention. Anyway, words are wind and that is neither here nor there. However....

....this person is insistent that Jessica Brown Findlay (Lady Sybil from Downton Abbey) was hired to play Alys Rivers but was fired at the last minute for personal reasons. He also claims that Findlay was also hired to play Lyanna Stark but dropped out due to scheduling issues and was replaced by the actress that we got. I can't find any reference to that particular rumor but it sounds intriguing. Was something like that ever rumored back in the day?