Sienna Miller looks stunning in an Oscar de La Renta black gown at the Oscars 2015
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The stunning Sienna Miller has hit the Oscars red carpet in a chic Oscar De La Renta gown.
While the star isn't up for an award herself, her film American Sniper - in which she plays a Navy SEAL sniper's wife is up for six awards tonight including Best Picture and Best Actor for Bradley Cooper.
