The daughter of former U.S. President Bill Clinton and current Secretary of State Hillary Clinton is set to marry Saturday in a lavish affair that is making headlines across the country.

Thirty-year-old Chelsea Clinton and investment banker Marc Mezvinsky, who is 32, have kept their wedding details quiet.  But speculation is swirling that the nuptials, due to take place at a 20-hectare riverside estate in a small town north of New York City, are to cost at least $2 million.

Security in the tiny town of Rhinebeck is expected to be very tight, with the Federal Aviation Administration closing local airspace for 12 hours starting Saturday afternoon.  

Talk show host Oprah Winfrey, film director Steven Spielberg and singer Barbra Streisand are rumored to be among the 500 invited guests.

Some information for this report was provided by AP.