Actress Sienna Miller arrives at the 'American Sniper' New York Premiere at Frederick P. Rose Hall, Jazz at Lincoln Center on December 15, 2014 in New York City.
( - Source: Rob Kim/Getty Images North America) see more angles »
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Sienna Miller Diamond Collar Necklace

Sienna Miller adorned her bare neckline with a stunning diamond collar necklace by Harry Winston.
Brand: Harry Winston

Sienna Miller Short Wavy Cut

Sienna Miller kept it short and chic with this wavy bob at the 'American Sniper' premiere.
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