News about Chelsea Clinton's wedding to investment banker Marc Mezvinsky has been kept tightly under wraps—although we do know who she's tapped to design her bridal gown—but details of the guest list are beginning to emerge. It's been reported that both President Barack Obama (and wife Michelle—we can't wait to see what she wears) and Oprah Winfrey are amongst the 500 invitees. Other big names on the list include Barbara Streisand, Steven Spielberg and media mogul Ted Turner. The Hudson Valley News has reported that next week's nuptials will be held at Astor Court in the luxe-yet-countrified town of Rhineback, New York. We'd love to be a fly on the wall to see Chelsea walk down the aisle.