The show follows two of London’s most prestigious law firms as they battle out the divorce case of the century

Sky and HBO have ordered a double run of a new legal drama from the creator of Hijack and Lupin, George Kay.

Dominic West and Sienna Miller will star as tech titan Morgan Henderson and his estranged wife, film star Carla Duval. The show follows two of London’s most elite law firms as they go head to head in the divorce case of the century.

The supporting cast includes Phoebe Fox, James McArdle, Nina Sosanya, Pip Torrens and Archie Renaux.

War is co-produced by New Pictures and Kay’s Observatory Pictures, in association with Sky and HBO; Kay is showrunner with Ben Taylor directing. Kay exec produces alongside Willow Grylls and Matt Sandford for New Pictures, Taylor, Susan Breen, Andrea Dewsbury and Megan Spanjan for Sky.

Writer/creator Kay said: “I am excited to be working with Sky and HBO – two homes for bold, ambitious storytelling – and our brilliant production team. WAR is a legal drama full of double crossing, scandal, twists and betrayal. The kind of TV show that made me want to write TV shows.”

Meghan Lyvers, executive director of original scripted, Sky, said: “We are thrilled to be working with George, Ben, Willow and team on WAR. The show is ambitious and provocative, brimming with unforgettable characters. It challenges the notions of power, identity, and success. We are proud to partner with New Pictures, Observatory Pictures and HBO on this distinctly modern drama.”