You’re warned of current Game of Thrones spoilers from here on out, as well as some potential surprises for Season 8.
Putting aside what that means for Jon and Dany’s relationship, one would assume that Rhaegar’s full relevance to the story has been revealed, precluding the likelihood of actor Wilf Scolding’s return.
But now that we have you – yes, Jon Snow is indeed the child of Lyanna Stark and Rhaegar Targaryen, as the closing moments of Season 7’s “The Dragon and the Wolf” helpfully confirmed.