A Second "Game Of Thrones" Prequel Announced Its Cast, And It Stars Some Major Newcomers

Fresh off House of the Dragon premiering its second season on Sunday, HBO has announced that another Game of Thrones prequel is officially in production.

Emma D'Arcy as Rhaenyra Targaryen wears a dark medieval-style outfit, standing on a rocky seaside landscape, from the TV show "House of the Dragon."
Theo Whitman/HBO

On Tuesday, the network revealed that work on A Knight of the Seven Kingdoms is underway in Belfast, Northern Ireland. Better yet, they also released a first photo:

A man is seen walking through a village in a scene from "A Knight of the Seven Kingdoms"
Steffan Hill/HBO

The image depicts actor Peter Claffey as Ser Duncan the Tall. A former rugby player, you might know Peter from the British series Wreck or an appearance on the Irish series Bad Sisters. He's also in Season 3 of Vikings: Valhalla, which premieres in July.

Closeup of Peter Claffey at a media event
Tristan Fewings / Getty Images

His and child actor Dexter Sol Ansell's castings were previously announced in April. According to Entertainment Weekly, Dexter plays "Egg," Duncan's squire. Dexter played Young Coriolanus in The Hunger Games: The Ballad of Songbirds & Snakes.

Closeup of Dexter Sol Ansell smiling on the red carpet wearing a vest, a patterned blazer, and jeans
Dave Benett / WireImage / Getty Images

Peter and Dexter are the stars of A Knight of the Seven Kingdoms, which is based on Game of Thrones author George R. R. Martin's 1998 novella The Hedge Knight.

George R.R. Martin on the "House of the Dragon" red carpet, wearing a paisley vest, a dark shirt, striped pants, and a cap
Jon Kopaloff / Getty Images

Here's the new series' logline, courtesy of HBO: "A century before the events of Game of Thrones, two unlikely heroes wandered Westeros…a young, naïve but courageous knight, Ser Duncan the Tall, and his diminutive squire, Egg. Set in an age when the Targaryen line still holds the Iron Throne, and the memory of the last dragon has not yet passed from living memory, great destinies, powerful foes, and dangerous exploits all await these improbable and incomparable friends."

The network also announced on Tuesday that several other actors have been cast in major roles in the series, including True Detective: Night Country star Finn Bennett as Aerion Targaryen.

Closeup of Finn Bennett
Robin L Marshall / FilmMagic / Getty Images

Bertie Carvel, who played UK Prime Minister Tony Blair on The Crown, has been cast as Baelor Targaryen.

Closeup of Bertie Carvel
Lia Toby / Getty Images

Tanzyn Crawford, of the Hulu miniseries Tiny Beautiful Things, will play Tanselle.

Closeup of Tanzyn Crawford
VALERIE MACON/AFP via Getty Images

Daniel Ings, who starred in the recent Netflix series The Gentlemen, will play Ser Lyonel Baratheon.

Closeup of Daniel Ings
Jeff Spicer / Getty Images

Finally, Sam Spruell, who appeared in Season 5 of Fargo, is Maekar Targaryen.

Closeup of Sam Spruell
Rodin Eckenroth / Getty Images

No word just yet on when A Knight of the Seven Kingdoms will air. Luckily, with House of the Dragon just beginning Season 2, that should hopefully tide over GoT fans for some time.