Chelsea Clinton's hush-hush wedding may as well be classified but one thing is no secret: There will be tears.

切尔西·克林顿婚礼的保密工作可谓做到了家，但现在看来有一件事不是秘密，那就是婚礼当天会有人掉泪。

Secretary of State Hillary Clinton is applauded by her daughter Chelsea (R) after arriving at the Clinton Global Initiative in New York September 25, 2009.

The only child of former President Bill Clinton and Secretary of State Hillary Clinton will marry longtime boyfriend Marc Mezvinsky this month in a ceremony that has withstood（抵挡，经得起） leaks better than many secrets in Washington.

"You should assume that if he makes it down the aisle¹（结婚） in one piece it's a major accomplishment," Hillary Clinton said of her husband in comments to NBC broadcast Monday from Pakistan.

"He is going to be so emotional, as am I, but we're both looking forward to it and very happy about it," she said.

Local media have reported the wedding will take place on July 31 at an estate in Rhinebeck north of New York City and there is speculation² the bride will wear Oscar de la Renta.

"My lips are sealed," Hillary Clinton said. "I am under very strict orders not to talk about it."

Chelsea Clinton, 29, who works at a New York hedge fund（避险资金） , has kept a low profile since her father left the White House in January 2001 but she campaigned for her mother during her unsuccessful run for the 2008 Democratic presidential nomination³.

Mezvinsky, 31, is an investment banker whose parents, Edward Mezvinsky and Marjorie Margolies-Mezvinsky, are both former Democratic members of the US House of Representatives.

The guest list -- rumored⁴ by New York media to include around 400 people -- is among the closely guarded secrets. Hillary Clinton has a message for all those Clinton supporters who might be still hoping for an invite: "We love you all but this is her wedding."