The next 'Game of Thrones' prequel is coming. Here's what to know about 'A Knight of the Seven Kingdoms'

• HBO is expanding the "Game of Thrones" universe with another prequel series.
• "A Knight of the Seven Kingdoms" takes place between the main series and "House of the Dragon."

"House of the Dragon" season two wrapped up on Sunday, but "Game of Thrones" fans have a second prequel to look forward to in 2025: "A Knight of the Seven Kingdoms."

Although the "Game of Thrones" ending disappointed many fans in 2019, HBO recognized that the world of Westeros is a lucrative property. And there's plenty of material to use considering all the spinoff stories and novellas that George R. R. Martin has written alongside the "Song of Ice and Fire" book series.

The network is also working on other prequel shows, including "Nine Voyages," "Ten Thousand Voyages," and "The Golden Empire."

"A Knight of the Seven Kingdoms" is set 72 years after "House of the Dragon" and 100 years before "Game of Thrones," as the network fills in the huge timeline of the fantasy franchise.

The story follows Ser Duncan the Tall and his squire, Egg, as they travel across Westeros together. Here's what you need to know about "A Knight of the Seven Kingdoms."

'A Knight of the Seven Kingdoms' follows Dunk and Egg

The first season is based on Martin's first novella in the "Tales of Dunk and Egg" series, called "The Hedge Knight." It introduces Ser Duncan the Tall, a knight who roams the country offering his services. He meets a young boy with a shaved head called Egg when he goes to a tournament to prove himself as a knight.

Egg's full name is actually Aegon V Targaryen, and he eventually rules Westeros on the Iron Throne as an adult. After "The Hedge Knight," the unlikely duo's adventures continue in "The Sworn Sword" and "The Mystery Knight."

In May 2023, HBO executive Francesca Orsi told Deadline that the network plans to adapt each novella into a six-episode season.

But much like the source material for "Game of Thrones," Martin has not finished Dunk and Egg's story. In a 2015 blog post, the writer said he plans to continue writing more Dunk and Egg stories, with tentative titles including: "The She-Wolves of Winterfell," "The Village Hero," "The Sellsword," "The Champion," "The Kingsguard," and "The Lord Commander."

Should Martin release these novellas in the future, HBO could easily turn "A Knight of the Seven Kingdoms" into a long-running series.

In March 2024, Warner Bros. CEO David Zaslav confirmed to investors that "A Knight of the Seven Kingdoms" will start streaming on Max in "late 2025," IGN reported.

The first trailer for 'A Knight of the Seven Kingdoms' showcased Dunk and Egg

HBO released the first teaser for "A Knight of the Seven Kingdoms" as part of its 2024-2025 preview trailer, alongside footage from other highly anticipated shows including "The Penguin," "IT: Welcome to Derry," and "The Last of Us" season two.

The footage sees Dunk (Peter Claffey) introduce himself as Ser Duncan the Tall while also giving a brief look at Egg (Dexter Sol Ansell). There are a few quick shots of Dunk training with his sword and a brief moment where he punches someone during a fight.

In June 2024, HBO announced that five other actors had joined the cast, per Deadline. "True Detective: Night Country" star Finn Bennett will play Prince Aerion Targaryen, "The Gentlemen" actor Daniel Ings will play Ser Lyonel Baratheon," and "Fargo" season five star Sam Spruell will play Aerion's father, Maekar Targaryen.

Additionally, "The Crown" alumni Bertie Cavel will play Maekar's brother, Baelor Targaryen, and Tanzyn Crawford will play Dunk's love interest, Tanselle.