A ‘Game of Thrones’ movie about Aegon the Conqueror is in development at Warner Bros.

House Targaryen is apparently not content with conquering our small screens. This is also coming to the big screen.

According to Page Six Hollywood, Warner Bros. working on a Game of Thrones prequel movie. Andor writer and House of Cards Showrunner Beau Willimon is attached as writer and has reportedly already submitted a draft of the film’s script.

Although the plot remains under wraps, Page Six reports that the film will center on King Aegon I Targaryen and his conquest of Westeros. The conquest took place almost 300 years before Game of Thrones himself, and Aegon carried it out alongside his sister-wives Visenya and Rhaenys. (Even in movie form, you can’t escape Targaryen incest.)

HBO has been discussing an Aegon the Conqueror TV show since 2023. Among those discussions was the possibility of a companion feature film that would lead into the series. It’s not yet clear whether Willimon’s film will serve as a similar bridge to an upcoming series, or if it will stand alone.

Of course, the future of film could be in flux because of Warner Bros. possible sale to Paramount Skydance, as the project could be abandoned after the merger. Here again, Game of Thrones is crucial for the Warner Bros. brands. and HBO, and that prominence could help it come to fruition in a turbulent media landscape.