We knew it was coming. After years of theories ( really), the show’s sixth season confirmed fans’ suspicions that(that’s fanspeak for Rhaegar + Lyanna = Jon) with a pivotal scene at
the Tower of Joy. Of course, Rhaegar was known to have married Elia Martell, so technically Jon still could have been a bastard. But in Season 7, Gilly () discovers Rhaegar got an annulment, and it’s later revealed that he and Lyanna were legally married. Jon Snow, aka Aegon Targaryen, is the legitimate heir to the throne.