A Knight of the Seven Kingdoms Cast and Characters

A Knight of the Seven Kingdoms is coming your way in 2026. It is the prequel to Game of Thrones and House of the Dragon. It is also the third series in the franchise that will make us witness a side of George R.R. Martin’s universe that we aren’t acquainted with. Unlike the aforementioned titles, A Knight of the Seven Kingdoms will be more character-driven and less blood-soaked. So, if you’re excited to watch the journey of Duncan the Tall and Egg, here’s the cast and character guide for A Knight of the Seven Kingdoms that will help you know every character who will play a crucial role in the series.

1. Peter Claffey as Ser Duncan the Tall

Ser Duncan the Tall is the main protagonist of A Knight of the Seven Kingdoms. Born in Flea Bottom, he was taken as a squire by Ser Arlan of Pennytree when he was a kid. Under the guidance of his mentor, Duncan the Tall travelled across different parts of Westeros, serving the high lords. However, when he and Ser Arlan were going to Ashford for a tournament, a tragedy hit them. Ser Arlan dies, and Duncan, also known as Dunk, decides to become the hedge knight to honour his deceased mentor.

Peter Claffey is an Irish actor who got the wonderful opportunity to play the lead role in the anticipated Game of Thrones spin-off. Previously, we have seen him in a couple of projects, including Vikings: Valhalla. However, it wouldn’t be unfair to say that after A Knight of the Seven Kingdoms’ debut, his career would certainly skyrocket.

2. Dexter Sol Ansell as Prince Aegon Targaryen

Prince Aegon Targaryen is also the main character of the television series. He was the fourth son of Maekar Targaryen, and was supposed to squire his elder brother Daeron at the tourney of Ashford. However, Daeron wasn’t interested at all, so he decided to shave Aegon’s hair so that nobody present at the event would recognize him. Later, when Dunk arrived and came across Aegon, he mistakenly believed Aegon to be a stable boy. Aegon also didn’t correct him and called himself ‘Egg’. He was so impressed with Dunk’s humility that he showed interest in becoming the hedge knight’s squire.

Dexter Sol Ansell is an 11-year-old British actor you may recognize as young Coriolanus Snow from The Hunger Games: The Ballad of Songbirds & Snakes. Besides that, the other notable projects he has worked on are Emmerdale, The Moor, Robin and the Hoods, Here, and more.

3. Finn Bennett as Prince Aerion “Brightflame” Targaryen

Prince Aerion Targaryen is, first of all, one of the Targaryens who is known for all the negative reasons. He was the elder brother of Aegon, but he was nowhere near like him. He believed himself to be superior to everyone else, and that’s why he loved exercising dominion over others, especially those whom he thought were way weaker than him.

Also, his obsessiveness with the dragons made him believe that he was a dragon in human form, and this thought fuels his arrogance and cruelty. Aerion often tormented Aegon, and that’s why the little prince started fearing him, thinking that his older brother was everything that a prince shouldn’t become.

Finn Benett is recognized for his appearances in True Detective: Night Country, Domina and more. The actor has portrayed complicated characters before, and this time he is about to play someone who is good-looking but has a monstrous personality trait. So, if Finn Bennett succeeds in making this role a success, he will not only make Aerion an unforgettable character of the Dunk and Egg saga but also position himself as one of the most talented actors out there.

4. Tanzyn Crawford as Tanselle

Tanselle was one of the most memorable characters from the saga. She was a puppeteer who travelled with her troupe to perform puppet shows at the Ashford Meadow tourney. She had an unusual height due to which she was nicknamed ‘too tall.’ Tanselle turned out to be someone who brought warmth to Dunk’s harsh world. Well, our main protagonist was drawn to her instantly, but not in any wrong way, though. He wanted to keep her safe, and that’s why, when Aerion Targaryen tried to assault her, Dunk was the one to protect Tanselle. Even though Tanselle played a brief role in the story, she left a great impact.

Tanzyn Crawford portrays the character in A Knight of the Seven Kingdoms. She has previously appeared in Swift Street and Tiny Beautiful Things.

5. Bertie Carvel as Prince Baelor “Breakspear” Targaryen

Born to King Daeron II Targaryen and Myriah Martell, Prince Baelor became the rightful heir to the Iron Throne, following his grandfather’s death. He was one of the most beloved Targaryen rulers, who was admired by the majority of the people in the realm. He was known for his unmatched strength and precision with the lance in the tourneys. In fact, after he broke the lance of Daemon Blackfyre in a tourney, Baelor was nicknamed ”Breakspear.”

Bertie Carvel plays Baelor Targaryen in A Knight of the Seven Kingdoms. He is an award-winning actor who has made an impression on the fandom with his appearances in several titles. These include The Crown, Doctor Foster, The Pride, and more.

6. Sam Spruell as Prince Maekar Targaryen

Maekar Targaryen is the father of Prince Aegon aka. Egg. He is the fourth son of King Daeron II Targaryen, who eventually got the chance to sit on the Iron Throne after he accidentally killed his own brother Baelor in the Trial of Seven. After the tragic incident, he lost all the warmth and made some of the toughest decisions of his life. For instance, he sent his son Aerion away and allowed Aegon to become Dunk’s squire.

Sam Spruel will appear as Prince Maekar Targaryen in the upcoming GOT prequel. The British actor has appeared in several television shows and movies. The most renowned ones are Dune: Prophecy, Mayday, Luther, and Doctor Who.

7. Daniel Ings as Ser Lyonel Baratheon

Ser Lyonel Baratheon was also known as Lyonel the Laughing Storm because of his gigantic size and monstrous laugh. He was the lord of Storm’s End, who was feared by the competitors in the tourney, as he was someone who had a massive physical strength and was exceptionally skilled with weapons. Ser Lyonel Baratheon was loud but a likeable character, who played a crucial role in the story of The Hedge Knight.

Daniel Ings will play the role of Ser Lyonel Baratheon in A Knight of the Seven Kingdoms. He is mainly recognized for The Gentlemen, Sex Education, The Crown, and more.