The Game of Thrones Mad King play cast RSC was confirmed in full on June 3, 2026 — and the Royal Shakespeare Company has assembled a company of stage performers for the world premiere that is every bit as ambitious as the production’s scope demands.
The Royal Shakespeare Company has revealed the full cast for the world premiere of Game of Thrones: The Mad King, a new play based on the novels by George R.R. Martin. Adapted by Duncan Macmillan and directed by Dominic Cooke, the play will have its world premiere at the Royal Shakespeare Theatre in Stratford-upon-Avon from Monday 20 July to Saturday 5 September, with official opening night on Saturday 8 August.
The site already has an article covering the initial Mad King stage play announcement — this article covers the specific full cast confirmation from June 3 and everything that the complete roster tells us about how the RSC is approaching one of Westeros’s most pivotal historical chapters. The stage play focuses on the legendary Tourney at Harrenhal that led to Robert’s Rebellion, about 17 years before the original Game of Thrones series’ timeline.
For the first time in franchise history, characters known from Game of Thrones are being performed live on stage — and the Game of Thrones Mad King play cast RSC is the full confirmation of who is playing them.
Game of Thrones Mad King Play Cast RSC: The Principal Cast in Full
The full principal cast is as follows: Michael Shaeffer as King Aerys II Targaryen, Noah Ritter as Prince Rhaegar Targaryen, Callum Woodhouse (The Durrells) as Lord Robert Baratheon, Michael Abubakar (Ganymede, Shakespeare’s Globe) as Eddard Stark, Harmony Rose-Bremner (The Inheritance, Garrick Theatre) as Lyanna Stark, Mariah Gale (RSC Associate Artist) as Queen Rhaella Targaryen / Lady Shella Whent, Daisy Franks as Cersei Lannister, Luke Brady (Operation Mincemeat) as Brandon Stark, Maxim Ays as Ser Jaime Lannister, Marty Breen as Catelyn Stark, Hughie O’Donnell as Lord Varys, Marcello Walton as Ser Jonothor Darry / Lord Tywin Lannister, Alexander Newland as Lord Rickard Stark, Edem-Ita Duke as Oberyn Martell.
Michael Shaeffer as King Aerys II Targaryen is the production’s central performance — the figure around whose descent into madness everything else in Robert’s Rebellion turns. The Mad King is not a character who appears on screen in Game of Thrones; he exists entirely in retrospective horror, in Jaime’s guilt, in the smell of wildfire that haunts the Kingslayer’s memory. Shaeffer is taking on a role that has been defined by absence — and filling it with a full stage performance.
Noah Ritter as Prince Rhaegar Targaryen is the most mythologically significant casting in the Game of Thrones Mad King play cast RSC. Rhaegar exists in Game of Thrones as the most romanticised and contested figure in the franchise’s history — the prince who chose Lyanna, whose choices set the rebellion in motion, and whose legacy shaped Jon Snow’s entire identity. The production dramatises him as a person making specific decisions, which is something no screen adaptation has attempted.
Michael Abubakar as Eddard Stark is young Ned — the man before the show, before the execution, before everything. The Game of Thrones Mad King play cast RSC Ned is at the point where honour felt like a strategy rather than a death sentence.
Callum Woodhouse as Robert Baratheon captures the king-to-be before the throne — the warrior whose grief over Lyanna made him a revolutionary. Woodhouse, known for The Durrells, plays Robert at the moment of maximum conviction.
Harmony Rose-Bremner as Lyanna Stark is the Game of Thrones Mad King play cast RSC’s most important female casting — giving full stage presence to a character who existed in Game of Thrones primarily as retrospective grief and franchise-shaping revelation.
Maxim Ays as Ser Jaime Lannister and Daisy Franks as Cersei Lannister complete the Lannister representation — both characters at their starting points, before the show’s events shaped everything that followed.
Edem-Ita Duke as Oberyn Martell brings the Red Viper to the Tourney at Harrenhal — the most memorable supporting presence in the Game of Thrones Mad King play cast RSC, carrying the weight of House Martell’s eventual connection to the play’s tragedy.
Game of Thrones Mad King play cast RSC is not a celebrity stunt roster — it is a company of serious theatre performers taking on characters the world knows from television and making them new, at the RSC’s flagship theatre, in the franchise’s most ambitious live event.
Read more: Robert’s Rebellion Explained: The Bloody Uprising That Ended Targaryen Rule Forever
George R.R. Martin’s Response to the Game of Thrones Mad King Play Cast RSC
Martin said of the Game of Thrones Mad King play cast RSC: “I love this cast — they bring all the strengths, flaws and intricacies within these characters that drive this important chapter of Westerosi history. They have a fire in them, and I can’t wait to see them bring that fire to the stage.”
Martin’s enthusiastic endorsement of the Game of Thrones Mad King play cast RSC stands in direct contrast to his very public dissatisfaction with the House of the Dragon creative relationship. Where he has described his involvement in season 3 as having become “abysmal,” his language about the RSC production is unambiguously celebratory — “I love this cast” is not the careful statement of a man who has learned to manage his public comments about adaptations. It is genuine enthusiasm.
Director Dominic Cooke said: “I’m very lucky to be working alongside such a talented group of artists on this show. The creative team and cast are exceptional and we’re super excited to bring Duncan Macmillan’s brilliant script and George R.R. Martin’s vivid imaginative world to life on stage.”
The combination of Martin’s active involvement as executive producer, his endorsement of the full Game of Thrones Mad King play cast RSC, and the RSC’s institutional commitment to the production signals that this is not a franchise product made to capitalise on the House of the Dragon season 3 promotional window. It is a standalone theatrical work that the franchise’s creator considers a faithful treatment of his material.
Game of Thrones Mad King play cast RSC Martin endorsement — “I love this cast, they have a fire in them” — is the highest possible signal about the production’s creative fidelity. The man who has been publicly critical of his television adaptation is publicly delighted with his stage one.
How to Get Tickets for the Game of Thrones Mad King Play Cast RSC
The Game of Thrones Mad King play cast RSC production will run at the RSC’s Royal Shakespeare Theatre in Stratford-upon-Avon from Monday 20 July to Saturday 5 September, with official opening night on Saturday 8 August. Public booking opened on April 22, 2026, through the Royal Shakespeare Company website at rsc.org.uk.
The Game of Thrones Mad King play cast RSC production is a strictly limited-run event — Stratford-upon-Avon only, no West End or touring dates confirmed. The RSC’s Royal Shakespeare Theatre seats approximately 1,000 people, which is large by RSC standards but not a commercial West End venue. For international fans, Stratford-upon-Avon is the only place to see the world premiere run.
Given the franchise’s global following and the limited ticket supply, the Game of Thrones Mad King play cast RSC announcement will intensify demand for a production already generating significant interest. If you are able to get to Stratford-upon-Avon between late July and early September, check availability at rsc.org.uk now.
Game of Thrones Mad King play cast RSC tickets are available at rsc.org.uk — strictly limited season, Stratford-upon-Avon only, July 20 to September 5. The world before Game of Thrones, on stage, with the characters who made it all happen. Book before it sells out.
Read more: NEW Game of Thrones Prequels in Development: What HBO Has Confirmed So Far
Frequently Asked Questions
Who is in the Game of Thrones Mad King play cast RSC? The Game of Thrones Mad King play cast RSC confirmed principals include Michael Shaeffer (King Aerys II), Noah Ritter (Prince Rhaegar), Michael Abubakar (Ned Stark), Callum Woodhouse (Robert Baratheon), Harmony Rose-Bremner (Lyanna Stark), Maxim Ays (Jaime Lannister), Daisy Franks (Cersei Lannister), Luke Brady (Brandon Stark), and Edem-Ita Duke (Oberyn Martell).
When does the Game of Thrones Mad King play open at the RSC? The Game of Thrones Mad King play cast RSC world premiere opens officially on August 8, 2026, at the Royal Shakespeare Theatre in Stratford-upon-Avon, with previews from July 20 and the run concluding September 5.
What is the Game of Thrones Mad King play about? The Game of Thrones Mad King play cast RSC stage production focuses on the legendary Tourney at Harrenhal that led to Robert’s Rebellion about 17 years before the original Game of Thrones series’ timeline.
Is George RR Martin involved in the Mad King play? Yes. Martin serves as executive producer on the Game of Thrones Mad King play cast RSC production and has publicly endorsed the full cast announcement, stating: “I love this cast — they have a fire in them.”
How do I get tickets for the Game of Thrones Mad King play? Tickets for the Game of Thrones Mad King play cast RSC are available through rsc.org.uk. Public booking opened April 22, 2026. The run is strictly limited to Stratford-upon-Avon — no West End or touring dates confirmed.
Final Thought
The Game of Thrones Mad King play cast RSC is Westeros doing something it has never done before — coming alive on stage, at the RSC, with the characters who existed before everything we know, making the choices that created it.
Aerys on the throne. Rhaegar at the tourney. Lyanna Stark, present and real, not a memory or a revelation. Robert Baratheon with his heart still intact. Jaime Lannister before he became the Kingslayer.
We know how this ends. The stage production will make us feel it as if we don’t.
Game of Thrones Mad King play cast RSC — Royal Shakespeare Theatre, Stratford-upon-Avon, July 20 to September 5, official premiere August 8. The franchise’s most important live event. George R.R. Martin loves this cast. They have a fire in them.
Read more: Game of Thrones The Mad King Stage Play Explained: Everything Announced About the RSC Production
House of the Dragon Season 3 | Official Final Trailer | HBO Max
