Game of Thrones is the title of a television adaption of A Song of Ice and Fire, starting with the first novel. The adaption is being written by David Benioff and D.B. Weiss, closely based on the novels. George R.R. Martin is serving as producer and creative consultant, and plans to write one episode per season depending on his workload. The series is being developed and produced by HBO and co-financed by the BBC. It will be filmed in Belfast in Northern Ireland and is the largest and most expensive television production ever mounted in the province.

The plan is for each novel to be adapted as a single television series of 60-minute episodes, with 12 episodes in the first season. As of mid-2009, only a single 60-minute pilot has been greenlit for production in October 2009. If HBO approve the pilot, production will begin on the full first season. No transmission date has yet been given. The pilot will be directed by BAFTA-award winner Thomas McCarthy (The Station Agent, The Visitor).

By 21 August 2009, fourteen roles had been cast, including Sean Bean as Lord Eddard Stark, Peter Dinklage as Tyrion Lannister, Mark Addy as King Robert Baratheon, Kit Harrington as Jon Snow, Jennifer Ehle as Catelyn Stark, Nikolaj Coster-Waldau as Jaime Lannister, Tamzin Merchant as Daenerys Targaryen, Harry Lloyd as Viserys Targaryen, Alfie Owen-Allen as Theon Greyjoy and Iain Glen as Jorah Mormont.

The roles of Sandor Clegane and Cersei Lannister have also been cast but not formally announced yet.

Cast announced so far
* Sean Bean as Eddard Stark.
* Peter Dinklage as Tyrion Lannister.
* Jennifer Ehle as Catelyn Stark.
* Mark Addy as Robert Baratheon.
* Nikolaj Coster-Waldau as Jaime Lannister.
* Tamzin Merchant as Daenerys Targaryen.
* Harry Lloyd as Viserys Targaryen.
* Alfie Owen-Allen as Theon Greyjoy.
* Iain Glen as Jorah Mormont.
* Richard Madden as Robb Stark.
* Kit Harington as Jon Snow.
* Jack Gleeson as Joffrey Baratheon.
* Sophie Turner as Sansa Stark
* Maisie Williams as Arya Stark