Set in an elven world 1200 years before the world of The Witcher, Blood Origin will tell the tale of the creation of the first prototype Witcher, and the events that lead to the pivotal conjunction of the spheres, when the world of monsters, men, and elves merged to become one.
Sophia Brown (The Capture) and Laurence O’Fuarain (Vikings) play Éile and Fjall, two warriors estranged from their opposing clans, Michelle Yeoh (Star Trek: Discovery) takes the role of Scían, a sword master, the last of her tribe, Mirren Mack (The Nest) is Princess Merwyn, Lenny Henry (The Lord of the Rings: The Rings of Power) plays Chief Sage Balor, and Minnie Driver (Speechless) stars as a Seanchaí. Francesca Mills (Pistol) is Meldof, Zach Wyatt (Karen Pirie), and Lizzie Annis (series debut) are celestial twin sages Syndril and Zacaré. Huw Novelli (The Capture) is Brother Death.
Other supporting cast members include Amy Murray as chief sage Balor’s apprentice Fenrik, Mark Rowley (The Last Kingdom) as King Alvitir, Daniel Fathers (Atlanta), and Faoileann Cunningham as clan chieftain Osfar and his daughter Ryl. Kim Adis (Foundation (2021)) is Merwyn’s handmaid Ket, Nathaniel Curtis (It's a Sin) portrays Brían, and Dylan Moran (Stuck) is Uthrok One-Nut. Ella Schrey-Yeats (His Dark Materials) portrays the young prophet Ithlinne and her mother Aevenien is played by Claire Cooper (Knightfall).
Declan de Barra is the writer and showrunner for the series, which is directed by Sarah O’Gorman and Vicky Jewson and executive produced by Lauren Hissrich, Matt O’Toole, Platige Films (Tomek Baginski & Jarek Sawko), and Hivemind (Jason Brown & Sean Daniel).