Actor Steve Toussaint, known for his role as Lord Corlys Velaryon in House of the Dragon, may have inadvertently confirmed a major casting decision for the upcoming third season. In a now-deleted Instagram post, Toussaint shared a cast list for House of the Dragon Season 3, Episode 4, revealing the inclusion of Prince Daeron Targaryen—a character long speculated to appear in the show.
The post was quickly taken down, but not before fan accounts captured and circulated screenshots across social media platforms. The list also included Lady Jeyne Arryn, a character who briefly appeared in Season 2, suggesting an expanded role in the upcoming season.
Who is Daeron Targaryen?
Daeron Targaryen is the youngest son of King Viserys I and Alicent Hightower, making him the younger brother of King Aegon II, Queen Helaena, and Prince Aemond. Unlike his siblings, Daeron was sent to be fostered by House Hightower in Oldtown, a decision made to solidify the family’s influence in Westeros. Though absent from the first two seasons, his existence has been subtly acknowledged in dialogue, most notably in a conversation between Alicent and her brother, Ser Gwayne Hightower.
In Fire & Blood, the novel by George R.R. Martin that serves as the basis for the series, Daeron is known to be a skilled dragon-rider, bonded with Tessarion, a blue-scaled she-dragon. While details about her age and growth differ in the source material, she is expected to be large enough for battle by the time the Targaryen civil war—known as the Dance of the Dragons—reaches its peak.
What This Means for Season 3
Daeron’s arrival is a significant development in the ongoing struggle between Rhaenyra and Aegon II for the Iron Throne. With another dragon-rider entering the fray, the balance of power may shift dramatically. His presence could also deepen the internal conflicts within House Hightower and the Targaryen factions.
Additionally, Toussaint’s leaked cast list hints at other notable absences and inclusions. Episode 4 will reportedly omit major players such as Prince Aemond, Otto Hightower, and Addam Velaryon, while featuring Lady Jeyne Arryn. If Jeyne plays a more substantial role, this could indicate increased focus on the Vale and its strategic importance in the war.
A Pattern of Early Reveals
This is not the first time House of the Dragon has faced early leaks. Casting confirmations and behind-the-scenes photos frequently surface online, fueling speculation about future plotlines. While HBO has yet to officially announce Daeron’s casting, Toussaint’s deleted post serves as the strongest evidence yet of his upcoming debut.
Season 3 of House of the Dragon is currently in production, with a release date expected in 2026 on HBO and Max.
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