Alberto E. Rodriguez/Getty Images for US-Ireland Alliance

WHAT SHE WORE At the Oscar Wilde: Honoring The Irish In Film event, Williams walked the green carpet in a black and white ensemble including a ruffled Givenchy shift and Nancy Gonzalez crocodile box clutch.

CELEBRITY: Michelle Williams

DESIGNER: Givenchy

TREND: Black

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Michelle Williams

Michelle Williams in Givenchy