Mary-Kate Olsen chose a dramatic custom-made, floor-length, black The Row gown for her grand arrival at tonight's Met Gala in NYC. MK and Ashley are a staple at the annual event and often pose together on the dramatic staircase prior to heading inside to mingle with fellow designers and stars. This time Mary-Kate was on her own and actually caused a bit of a stir when she arrived at exactly the same time as Kanye West. Last year, MK wowed in a bold, crimson vintage gown, but this year she went with a bold design from one of her own lines. Things are just getting started at the Met so check back throughout the night, and tomorrow, for a comprehensive look at all the dresses. For now, be sure to vote on Fab's Met Gala fashion polls and tell us what you think of Mary-Kate's latest look.