War (2026): HBO Legal Drama Cast, Release Date, Story & Reviews

The courtroom has become a battlefield in War, HBO and Sky's new legal thriller created by George Kay, the writer behind Lupin and Hijack. Starring Dominic West and Sienna Miller, the series drops viewers into London's elite legal world, where a spectacular divorce becomes the ultimate test of power, loyalty and ambition.

Rather than following a different case every week, the first season builds around one enormous legal conflict: the bitter separation between tech entrepreneur Morgan Henderson and international film star Carla Duval.

What Is War (2026) About?

War follows the lives of London's most powerful lawyers as two elite firms, Cathcarts & Sons and Taylor & Byrne, go head-to-head over a sensational divorce case.

The case involves tech entrepreneur Morgan Henderson and international movie star Carla Duval, whose marriage has collapsed into a highly public battle. Their separation threatens to expose personal secrets while giving both law firms an opportunity to prove their dominance.

The legal fight becomes just as personal for the lawyers involved. Ambitious young solicitor Jonathan "Johnny" Warren enters the world of elite London law and quickly finds himself surrounded by people prepared to bend professional and moral boundaries to win.

Dominic West Plays Morgan Henderson

Dominic West stars as Morgan Henderson, a powerful British tech entrepreneur whose marriage to Carla Duval becomes the center of the season's legal storm.

West is best known for roles in The Wire, The Crown and Downton Abbey: The Grand Finale. In War, he plays a wealthy and influential figure whose private life suddenly becomes impossible to separate from his public reputation.

Sienna Miller Plays Carla Duval

Sienna Miller plays Carla Duval, an internationally famous film star caught in a divorce that threatens to become a public spectacle.

Carla's legal battle against Morgan gives Miller a role that combines celebrity pressure, emotional betrayal and strategic maneuvering. Her character turns to Taylor & Byrne as the fight escalates.

The Rival Law Firms

Taylor & Byrne

Taylor & Byrne represents Carla and operates as one of London's most ambitious modern legal firms. Serena Byrne, played by Phoebe Fox, and Nicholas Taylor, played by James McArdle, are partners in both business and life.

Cathcarts & Sons

Morgan's side is represented by the established firm Cathcarts & Sons, where Beatrice "Queen Bea" Ubosi, played by Nina Sosanya, and St John Smallwood, played by Pip Torrens, are among the senior figures.

The rivalry between the two firms is just as important to the series as the divorce itself. Every negotiation, courtroom maneuver and private conversation becomes another opportunity to gain leverage.

War Cast: Who Stars in the HBO Series?

Johnny Warren: The Young Lawyer Caught in the Middle

Archie Renaux plays Jonathan "Johnny" Warren, an ambitious young lawyer whose arrival provides one of the show's most accessible perspectives on London's elite legal world.

Johnny is drawn into the rivalry between Taylor & Byrne and Cathcarts & Sons, forcing him to navigate a professional environment where information can be as valuable as legal expertise and where ambition comes with a serious moral cost.

His position also allows War to examine the class differences within the legal profession, rather than focusing exclusively on the wealthy clients and senior lawyers controlling the case.

War Release Date and Weekly Schedule

War premiered in the United States on October 1, 2026, at 9 p.m. ET/PT on HBO and was made available to stream on HBO Max.

In the UK, the eight-part Sky Original launched on October 2, 2026, on Sky and NOW. Episodes are being released weekly rather than dropping as a complete season.

War Season 1 Episode Guide

The first season consists of eight hour-long episodes. HBO releases the episodes weekly in the United States, while Sky and NOW follow their UK rollout.

Who Created War?

War was created and written by George Kay, whose previous credits include Netflix's Lupin and Apple TV+'s Hijack.

Ben Taylor serves as lead director, while the series is produced by New Pictures and Observatory Pictures in association with Sky and HBO.

The creative team worked with experienced divorce lawyers during development to give the legal world and its emotional confrontations greater authenticity.

Is War Based on a True Story?

War is a fictional drama rather than a direct adaptation of one real divorce case. However, creator George Kay drew inspiration from real-life high-profile divorces and consulted divorce lawyers during development.

Some scenes also deliberately echo recognizable celebrity-divorce moments. The series' public divorce filing sequence, for example, was inspired in part by the real-life moment when actress Olivia Wilde was served custody papers during a public presentation in 2022.

War Reviews: What Are Critics Saying?

Early critical reaction has been strong. At the time of publication, War holds an 86% Tomatometer score from 14 critics on Rotten Tomatoes.

Reviews have highlighted the show's polished visual style, fast-moving legal maneuvering and the performances of Dominic West and Sienna Miller. The series has also attracted comparisons to glossy legal and workplace dramas because of its combination of professional competition, personal scandal and ambitious characters.

Dominic West and Sienna Miller's On-Screen Battle

One of the biggest draws is the chemistry between Dominic West and Sienna Miller. The pair have known each other for more than two decades, making their decision to play hostile estranged spouses particularly intriguing.

Rather than portraying the divorce as a simple battle between a villain and a victim, the series uses the two characters to explore how affection, resentment, wealth and public image can become entangled when a marriage collapses under intense scrutiny.

War Season 2 Is Already Confirmed

The biggest piece of good news for viewers is that War was ordered for two seasons from the beginning.

Season 2 will move away from the Morgan and Carla divorce and introduce a new major legal battle. Marisa Tomei, Kelly Macdonald and David Harewood have been confirmed for the next story.

The second season remains within the same legal world and follows the lawyers as they become involved in an explosive defamation case.

Where to Watch War

In the United States, War airs on HBO and streams on HBO Max. In the UK, Ireland and Italy, the series is available through Sky and NOW.

The series is also available through Sky and WOW in Germany, Austria and Switzerland, while HBO Max carries the series in several other international markets.

Why War Could Become HBO's Next Prestige Legal Hit

War arrives with a combination that makes it easy to understand its early buzz: recognizable stars, an expensive-looking production, a scandalous central conflict and two fictional law firms willing to do almost anything to win.

But the show's bigger hook is the way it treats law as a form of warfare. Morgan and Carla's marriage may be collapsing, but the lawyers fighting over their interests are building careers, reputations and rivalries that could outlast the divorce itself.

With eight episodes in Season 1 and another season already ordered, War is positioned to become more than a one-off divorce drama. HBO and Sky are building an anthology-style legal universe in which the firms remain while each season introduces a new headline-making case.

War (2026) FAQ

When did War premiere?

War premiered on HBO and HBO Max in the United States on October 1, 2026. It launched on Sky and NOW in the UK on October 2.

How many episodes does War Season 1 have?

Season 1 has eight episodes, released weekly.

Who stars in War?

Dominic West, Sienna Miller, Archie Renaux, Phoebe Fox, James McArdle, Nina Sosanya and Pip Torrens lead the ensemble.

What is War about?

The series follows two rival London law firms battling over the divorce of tech entrepreneur Morgan Henderson and international film star Carla Duval.

Is War based on a true story?

No. The series is fictional, although its creators drew inspiration from real high-profile divorces and consulted real divorce lawyers.

Will War have a Season 2?

Yes. HBO and Sky ordered two seasons from the beginning. Season 2 will focus on a new defamation case and stars including Marisa Tomei, Kelly Macdonald and David Harewood.