Sienna Miller debuted an Erdem ensemble featuring showgirl-inspired feathers and a high-low asymmetric hemline at the New York City premiere of her upcoming drama series War, held on Tuesday night at the Perelman Performing Arts Center, according to coverage from Women’s Wear Daily. The 44-year-old actress stars alongside Dominic West in the eight-part series, which focuses on two rival law firms representing opposite sides of a high-profile divorce.
Inside Sienna Miller’s Erdem Red Carpet Look
Designed by Erdem Moralıoğlu, the sleeveless black dress made its runway debut days prior during London Fashion Week as part of the label’s spring 2027 ready-to-wear collection. According to Women’s Wear Daily, the garment featured a square neckline, a fitted silhouette with ruching through the waist and hips, and an ivory floral embellishment at one hip. Fluffy white feathered trimmings peeked through the short hemline and trailing fabric to create added volume, with Miller completing the outfit with black peep-toe pumps and statement silver-tone earrings.
Plot and Production Details for the Series War
Created by George Kay, War follows an intense legal battle between competing London law firms managing a bitter divorce between international film star Carla Duval, played by Miller, and wealthy tech entrepreneur Morgan Henderson, played by West. According to Daily Mail reporting on the subsequent London premiere at the Odeon Luxe in Leicester Square, the series is scheduled to debut on October 1 on HBO in the United States and October 2 on Sky Atlantic and NOW in the United Kingdom. Sky has already ordered a second season, which will shift focus to a major defamation legal case, establishing the project as an anthology series.
Cast Additions and Premiere Appearances
The red carpet events brought out several members of the ensemble cast alongside the two leads. According to Daily Mail coverage, Miller attended the London screening accompanied by her 14-year-old daughter, Marlowe. Additional cast members walking the carpet included Emma Laird, who plays training associate Molly Giordano at the fictional law firm Taylor & Byrne, and Rose Williams, who portrays Flora Monroe. The cast also features Nick Mohammed, Pip Torrens, Nina Sosanya, Archie Renaux, Phoebe Fox, and James McArdle.
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