A new play based on fantasy series Game of Thrones is set to open in Stratford-upon-Avon this summer, the Royal Shakespeare Company (RSC) has announced.

Game of Thrones: The Mad King, which is being made in association with broadcast network HBO, will be set 10 years before the events of the original books and TV series.

The stage prequel will tell an original story, based on new material from author and executive producer George RR Martin.

In a statement, Martin said he had welcomed the stage adaptation "with great enthusiasm and excitement", adding that it will be "thrilling to watch the events of this new play unfold in a live environment".

The show will premiere at the Royal Shakespeare Theatre in the famous Bard's Warwickshire hometown in the summer, with tickets going on sale in April.