What: The Human Rights' Campaign and Calvin Klein celebrate Americans for Marriage Equality.

Where: The Calvin Klein Collection boutique on Madison Avenue.

When: Wednesday, April 17th.

Who: Francisco Costa hosted the evening, honoring New York City Council Speaker, Christine Quinn and Goldman Sachs CEO, Lloyd Blankfein, surrounded by a slew of Calvin Klein-clad ladies including Uma Thurman, Laure Heriard Dubreuil, and Hanneli Mustaparta.

Why: "It's the second year that we've created this event," said Costa, in between greeting his well-dressed guests at the door. "It makes so much sense for the house. Calvin has always been very forward-thinking and on the cusp of what's happening, so it's great for us to be able to support the cause."

Photos: BFA