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.
(December 14, 2014 - Source: Rob Kim/Getty Images North America) see more angles »

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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