Why Did They Change Actors in ‘House of the Dragon’?

Spoiler alert: The following article contains spoilers for House of the Dragon on HBO.

In retrospect, it may be easy to view the first five episodes of House of the Dragon as something of a prologue, featuring younger actors in several of the show’s key roles. In Episode 6, though, which is titled “The Princess and the Queen,” we’re introduced to new actors in those roles. Most notably, Emma D’Arcy takes over for Milly Alcock as Rhaenyra, and Olivia Cooke takes over for Emily Carey as Alicent.

Source: https://www.distractify.com/p/why-did-they-change-actors-in-house-of-the-dragon