Kate Mara, Dianna Agron
Dimitrios Kambouris/Getty Images

Kate Mara (in Madewell) and Dianna Agron (in Tracy Reese for Anthropologie) celebrated the start of the season at Coach’s Carnival, held on the High Line in New York City. The Glee actress carried a black clutch from the leather brand’s upcoming Legacy collection, in stores this August. Click through to see more stars at last night’s hottest Hollywood parties!

— Rose Walano, reporting by Nikki Ogunnaike