English actor Sienna Miller poses upon arrival on the red carpet for the world premiere of the eight-part television series "WAR", in Leicester Square in central London on September 16, 2026. (Photo by Henry NICHOLLS / AFP via Getty Images)

English actor Sienna Miller poses upon arrival on the red carpet for the world premiere of the eight-part television series "WAR", in Leicester Square in central London on September 16, 2026. (Photo by Henry NICHOLLS / AFP via Getty Images)

English actor Sienna Miller poses upon arrival on the red carpet for the world premiere of the eight-part television series "WAR", in Leicester Square in central London on September 16, 2026. (Photo by Henry NICHOLLS / AFP via Getty Images)

English actor Sienna Miller poses upon arrival on the red carpet for the world premiere of the eight-part television series "WAR", in Leicester Square in central London on September 16, 2026. (Photo by Henry NICHOLLS / AFP via Getty Images)

English actor Sienna Miller poses upon arrival on the red carpet for the world premiere of the eight-part television series "WAR", in Leicester Square in central London on September 16, 2026. (Photo by Henry NICHOLLS / AFP via Getty Images)

English actor Sienna Miller poses upon arrival on the red carpet for the world premiere of the eight-part television series "WAR", in Leicester Square in central London on September 16, 2026. (Photo by Henry NICHOLLS / AFP via Getty Images)

English actor Sienna Miller poses upon arrival on the red carpet for the world premiere of the eight-part television series "WAR", in Leicester Square in central London on September 16, 2026. (Photo by Henry NICHOLLS / AFP via Getty Images)

English actor Sienna Miller and English actor Dominic West pose upon arrival on the red carpet for the world premiere of the eight-part television series "WAR", in Leicester Square in central London on September 16, 2026. (Photo by Henry NICHOLLS / AFP via Getty Images)