Rhaenyra Targaryen in the first season of House of the Dragon was played by Emma D’Arcy.

Quick Scoop

Emma D’Arcy took over the role for the adult version of Rhaenyra in Season 1, while younger Rhaenyra was played by Milly Alcock.

Cast Note

That casting split is why you may see both actors associated with the character, depending on which episodes or age of Rhaenyra people are talking about.