The dress code for the event is “Gilded Glamour” and it’s inspired by the Costume Institute’s exhibition, In America: An Anthology of Fashion. Guests are asked to “embody the grandeur—and perhaps the dichotomy—of Gilded Age New York,” a period that stretched from 1870 to 1890. The official co-chairs this year are Regina King, Blake Lively, Ryan Reynolds, and Lin-Manuel Miranda.