NEW YORK, NY - SEPTEMBER 07: Sienna Miller attends the Cartier Fifth Avenue Grand Reopening Event at the Cartier Mansion on September 7, 2016 in New York City. (Photo by Dimitrios Kambouris/Getty Images for Cartier)
NEW YORK, NY - SEPTEMBER 07: Sienna Miller attends the Cartier Fifth Avenue Grand Reopening Event at the Cartier Mansion on September 7, 2016 in New York City. (Photo by Dimitrios Kambouris/Getty Images for Cartier)