The youngest child of Aegon V and Betha Blackwood, she was married to Lord Ormund Baratheon. When all four of her elder siblings broke their betrothals to the great houses, the Baratheons were amongst those spited. After a short rebellion and a trial by combat, she was betrothed to Ormund and sent to Storms end to act as cupbearer to Lord Lyonel. She married Ormund and had her son Steffon a year later. She’s marriage to House Baratheon helped lead to the downfall of House Targaryen as her grandson Robert Baratheon used his relation to her as his claim to the Iron Throne after he rebelled against and nearly decimated House Targaryen. I like to think that she was still alive in the current timeline.
Sneak peek of what’s next: Rhaenys Targaryen daughter of Rhaegar
Dexter Sol Ansell, playing Egg (the future King Aegon V Targaryen), is best known for playing the (very) young Coriolanus Snow in the opening scene for The Hunger Games: The Ballad of Songbirds and Snakes.
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I think Dexter is a perfect choice for Egg! He looks very HBO-Targaryen, and IMO has a strong resemblance to Leo Ashton (young Aemond in HOTD S1), as well as Emma D'Arcy (Rhaenyra). Of course he'll be shaving his head (poor kid), and with those light eyebrows, I'm sure he will be very very egg, lol.
Our new Dunk, Peter Claffey, from Portumma, Ireland, used to be a rugby player (he's 1.96m, 6'5"), but left the sport in 2018 and got into acting. Here's a clip from his agent's site, and for more videos see here.
I personally think this clip is highly convincing of Peter's potential in this role. "We could use a man-mountain like you", indeed.