Game of Thrones movie in the works at Warner Bros. from Andor writer Beau Willimon

Game of Thrones movie in development at Warner Bros. with Andor writer Beau Willimon attached to write the script

Winter is coming to the big screen. A "Game of Thrones" movie is officially in development at Warner Bros., with acclaimed writer Beau Willimon attached to pen the script.

Willimon, best known as the showrunner of "House of Cards" and a writer on the critically acclaimed "Andor" series, has already submitted a draft for the feature film, according to Page Six Hollywood, which first broke the news.

While plot details remain unconfirmed, sources indicate the film will focus on Aegon I, the legendary founder of the Targaryen dynasty, and his conquest of Westeros. This story takes place several centuries before the events of the original HBO series, chronicling how the Targaryens first established their reign over the Seven Kingdoms. The family would later spawn iconic characters like Daenerys Targaryen, played by Emilia Clarke in the hit series.

The project represents Warner Bros.' first attempt to bring George R.R. Martin's world to movie theaters, expanding beyond the successful HBO television universe that already includes the prequel series "House of the Dragon" and the upcoming "A Knight of the Seven Kingdoms."

However, the film's path to production faces potential complications. Warner Bros. is currently in the process of being sold to Paramount Skydance, and if the merger is approved, new leadership could potentially scrap existing projects in development.

Despite the uncertainty, "Game of Thrones" remains one of the company's most valuable franchises. Paramount Skydance CEO David Ellison has pledged to release 30 films theatrically once the merger is complete, meaning the combined entity will need substantial content for their joint slate. As one of HBO's crown jewels, a Targaryen conquest film would seemingly fit those ambitions.

Representatives for Warner Bros. and HBO have not yet commented on the project. More details are expected to emerge as development continues.