Mary-Kate and Ashley's Sister Act and More!

Mary-Kate and Ashley Olsen
Photo: Justin Campbell/

Mary-Kate and Ashley Olsen posed in support of little sister Elizabeth at the after-party for the New York Film Festival premiere of the budding actress's big screen drama Martha Marcy May Marlene, held at the Empire Hotel. Click through to see Christina Hendricks, Zoe Saldana and more stars at last night's hottest parties!

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