Clintons in tears over Chelsea? You can bet on it

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.

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

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 leaks better than many secrets in Washington.

"You should assume that if he makes it down the aisle 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 speculation 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, 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 nomination.

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

The guest list -- rumored 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."

(Reporting by Michelle Nichols; Editing by Doina Chiacu)