Claire Danes caused an early flurry on social media wearing a Zac Posen dress, similar to Cinderella's ball gown, which was illuminated from underneath as she walked the red carpet. The Twittersphere briefly mistook the "Homeland" actress for model Heidi Klum.
Hugh Dancy, from left, Claire Danes and Zac Posen arrive at The Metropolitan Museum of Art Costume Institute Benefit Gala, celebrating the opening of "Manus x Machina: Fashion in an Age of Technology" on Monday, May 2, 2016, in New York. (Source: AP)