Former U.S. President Bill Clinton, left, walks Chelsea Clinton down the aisle during her wedding to Marc Mezvinsky at the Astor Courts Estate on Sunday, July 31, in Rhinebeck, N.Y. Chelsea Clinton, the daughter of former U.S. President Bill Clinton and Secretary of State Hillary Clinton, married Marc Mezvinsky today in an interfaith ceremony at the estate built by John Jacob Astor on the Hudson River about two hours north of New York City.