Sienna Miller, who is pregnant with her first child, attended W Magazine's party in NYC for the opening of photographer Solve Sundsbo's new installation. She wore a Hugo Boss dress.
Since she's pregnant and it's winter, it makes sense for her to wear this comfy, loose-fitting black halter gown. Sienna accessorised with lots of gold jewelery and a gold cuff, which is becoming quite a trend.
Image Source: justjared.buzznet.com
