George R.R. Martin’s ‘Mad King’ Play Lands at RSC

Westeros is heading to the stage. George R.R. Martin’s long-rumored Game of Thrones prequel play, Game of Thrones: The Mad King, will premiere at the Royal Shakespeare Theatre in Stratford-upon-Avon in summer 2026.

The production marks a major new expansion of Martin’s fantasy universe — this time into live theater, with the Royal Shakespeare Company behind it. For readers who first met these characters on the page, it’s a full-circle moment: dynastic drama returning to a Shakespearean stage.

Return to Harrenhal

The Mad King chronicles the fateful Tourney at Harrenhal, the glittering event that set the stage for Robert’s Rebellion and the fall of House Targaryen. In the novels, the tourney becomes the catalyst for rebellion, drawing together figures like Ned Stark, Robert Baratheon and Jaime Lannister more than a decade before the events of Game of Thrones.

The official description promises lavish banquets, uneasy alliances and whispers of treason as dissent grows around the increasingly unstable Mad King. Family bonds, prophecy and the line of succession hang in the balance as the drums of war begin to sound.

The play is adapted by Duncan Macmillan, whose credits include Lungs, People, Places and Things and a stage adaptation of 1984, and directed by Dominic Cooke, former artistic director of the Royal Court and an RSC associate. Martin serves as executive producer and creator.

The Royal Shakespeare Company has called the project a natural fit, aligning Westeros’ warring houses with the sweeping history cycles of Shakespeare. The production is co-produced with Warner Bros. Theatre Ventures on behalf of HBO and several stage and entertainment partners.

A New Medium for Westeros

Martin has said he welcomes the move to theater, embracing the unique space where audience imagination and storytelling meet live on stage. For an author who once imagined his saga existing solely as novels, the journey from page to television — and now to Shakespeare’s hometown — is striking.

The world premiere will take place at the Royal Shakespeare Theatre, with priority booking for RSC supporters opening 14 April 2026. Public booking details are expected in April, and tickets will be limited due to anticipated demand.

For fans still debating how the saga will ultimately conclude in prose, especially after Martin reiterated that his book ending will differ from the show’s in his promised alternate conclusion to HBO’s Game of Thrones, this stage prequel offers a fresh lens on the tragedy that shaped the Seven Kingdoms.

Cast and further production details are yet to be announced. But one thing is certain: this summer, the road to rebellion runs straight through Stratford-upon-Avon.