HBO has revealed the second official Game of Thrones spin-off and it's a show that nobody else on their best day would've expected.

Just days after House of the Dragon Season 2 started production, HBO revealed that a new show is coming and it's from a fan-favorite prequel tale.

A Knight of the Seven Kingdoms: The Hedge Knight will adapt the events of George R.R. Martin's Dunk and Egg, which is a story that follows Ser Duncan the Tall (Dunk) and a young Aegon V Targaryen (Egg).

Now, if that name rings a bell, it's because Aegon V is the older brother of Maester Aemon of the Night's Watch who makes an appearance in the books, A Song of Ice and Fire, as well as its live-action adaptation, Game of Thrones. But, don't expect a lot of overlap between the main series and The Hedge Knight. It's set 90 years before the events of Game of Thrones, and given how short the lives in Westeros are, it's best to treat this upcoming show as its own thing.

George R.R. Martin has signed on as the writer and executive producer of The Hedge Knight, which is one of several other Game of Thrones shows in development at HBO.