Game of Thrones Prequel Stage Play Set to Premiere by Royal Shakespeare Company
February 18, 2026
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The cast will feature young protagonists in their twenties, underscoring themes of growth, rites of passage, and coming-of-age.
The production emphasizes growth and identity through these young characters, aligning with a coming-of-age arc.
Macmillan and Cooke describe a new dawn shadowed by the traditional tournament intrigue, signaling political maneuvering and looming conflict.
The Royal Shakespeare Company has announced the world premiere of Game of Thrones: The Mad King, a stage play adapted by Duncan Macmillan from George R. R. Martin’s novels, directed by Dominic Cooke, set before the events of the books.
The production is a major co-presentation with partners including Warner Bros. Theatre Ventures, HBO, Access Entertainment, and others, with tickets going on sale in April.
The plot centers on a lavish Harrenhal tournament where shifting alliances and dissent against the Mad King drive a web of intrigue involving Targaryen, Stark, Lannister, Baratheon, and Martell figures.
The official blurb teases themes of family bonds, prophecies, and a dangerous power struggle, while posing the question of who will survive and rise.
Lyanna Stark is highlighted as a pivotal driver of the broader narrative and a bridge to the origins of Westeros’ ongoing conflicts.
Director Cooke aims to make the show accessible to both longtime fans and newcomers, delivering a contained yet richly lore-filled experience.
Casting is underway, with Lyanna’s role prioritized and anticipated to feature a rising star; two key roles have already been offered.
The project fits into broader RSC strategy of drawing in new audiences with popular franchises while managing budget considerations.
Summary based on 18 sources
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Sources

The Guardian • Feb 18, 2026
‘Summer is coming!’: Royal Shakespeare Company to stage epic Game of Thrones prequel
The Times Of India • Feb 19, 2026
'Game of Thrones' prequel play 'The Mad King' set for stage debut, explores young heroes of Westeros
Variety • Feb 18, 2026
'Game of Thrones' Play Sets World Premiere at Royal Shakespeare Theatre
Gizmodo • Feb 18, 2026
The ‘Game of Thrones’ Prequel Play Is Officially Happening