Actress Sienna Miller attends the 2015 Social Good Summit at 92Y on September 28, 2015 in New York City.
(September 27, 2015 - Source: Mireya Acierto/Getty Images North America) see more angles »

Sienna Miller Medium Wavy Cut

Sienna Miller sported a cute wavy hairstyle during day 2 of the 2015 Social Good Summit.
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