Mandatory Credit: Photo by Broadimage/REX/Shutterstock (9665082di) Sienna Miller The Metropolitan Museum of Art's Costume Institute Benefit celebrating the opening of Heavenly Bodies: Fashion and the Catholic Imagination, Arrivals, New York, USA - 07 May 2018 2018 Costume Institute Benefit: Celebrating the opening of Heavenly Bodies: Fashion and the Catholic Imagination - Arrivals