Olivia, I’ve seen a lot of debate over the end of this episode, when Viserys mistakes Alicent for Rhaenyra and tells her about his ancestor Aegon the Conqueror’s prophecy of a messianic “Prince That Was Promised.” She mistakenly believes Viserys is referring to their son, Aegon. Does she fully believe it, or is she hearing what she wants to hear?

COOKE We spoke a lot about this. There was a massive amount of relief when Alicent told Rhaenyra, “You will make a great queen.” She’s so over the fighting and having this ball of bitterness and anxiety in her stomach: Just let it go, Rhaenyra is the heir, this is fine.

When Viserys says that, I genuinely think she thinks he’s talking about Aegon, her son. And I think she’s furious. She’s like, “After all that?” But Viserys is on his deathbed; that’s what he requested, and so she must follow it through. Whether that’s unconscious wishful thinking, I don’t know, but that’s how I played it.

Emma, this is shifting gears pretty dramatically, but there’s a video clip of you telling Olivia that your favorite drink is “a Negroni Sbagliato with prosecco in it” that went viral on TikTok and Twitter and inspired a numberofarticles. Is this something you’re aware of?

D’ARCY I thought it’d be quite funny to be drinking one right now, but I’m not. [Laughs.] I keep thinking I should tell my mum that I’ve become a meme in the hope that she’ll be happy for me, but I’d have to explain what a meme is, and I’ve decided it’s too much effort.

I feel so embarrassed. Because in those interviews, when we’ve been at it for six hours, I’m honestly only trying to make Olivia laugh.

COOKE [Laughs.] Is that right?

D’ARCY No, I’m obviously doing Campari’s next campaign.

COOKE I’d be like, “Ten million pounds, please!”

I interviewed House of the Dragon stars Emma D’Arcy and Olivia Cooke for the New York Times.