Dominic West and Sienna Miller to Star in Sky and HBO Legal Thriller ‘War,’ Creator George Kay’s New Series

Sky and HBO have commissioned a new two-season legal drama titled “War,” featuring Dominic West and Sienna Miller in lead roles, according to a report by The Hollywood Reporter. The series is set against the backdrop of London’s legal world and follows a high-profile conflict involving a powerful technology figure and the personal and professional fallout surrounding his marriage.

West is cast as a tech titan, while Miller plays his estranged wife, who is described as a film star. The series centers on the tension between their public images and private breakdown, with the legal plotline framed through the stakes of reputation, leverage, and control in a courtroom-driven setting.

The Hollywood Reporter also reported that the show comes from writer and creator George Kay, known for earlier television work that blends procedural elements with higher-stakes personal drama. In “War,” Kay’s approach is expected to place courtroom strategy and legal maneuvering alongside relationship rupture and competing narratives about what is true, what can be proved, and what gets decided in public.

The report describes the production as a Sky and HBO project, indicating a distribution model that pairs a UK broadcaster with a U.S. streaming and pay-television platform. While details on a specific premiere date were not included in the provided material, the existence of the two-season commitment suggests an accelerated planning timetable for casting, scripting, and production scheduling.

The announcement of a two-season order is a significant operational marker for a drama series, particularly for a show built around an ensemble of recurring legal and media figures and the continuing arc implied by an extended commitment. For viewers, it indicates that the series’ core storyline is intended to play out across more than a single installment cycle rather than ending at the conclusion of an initial run.

For the performers, both West and Miller’s participation reflects a continued shift in prestige television casting, where major film and television actors increasingly anchor original series aimed at subscription and premium cable audiences. The roles also place them inside a genre defined by evidence, testimony, and procedural detail, even as the reporting frames the narrative as equally driven by the strain inside a marriage under public scrutiny.

The Hollywood Reporter’s exclusive presentation of an image tied to the series underscores the marketing effort around the new production. As the project moves from casting and development into production and release, additional announcements are likely to address supporting cast, episode count per season, production dates, and the show’s exact release windows on Sky and HBO.