Emma Watson Kate Mara Katie HolmesSandra Bullock

With fall comes the start of new beginnings, and guests celebrated in style as the evening was full of openings and premieres. Some of our favorites looks included Sandra Bullock's white dress at the "Gravity" Premiere and Kate Mara's all-back Michael Kors ensemble at the Jagermeister Spice celebration. Click through to find out who else we selected as the evening's best dressed guests.