RHINEBECK, N.Y. - Chelsea Clinton was poised to marry her longtime boyfriend at an exclusive estate along New York's Hudson River after weeks of secrecy and buildup that had celebrity watchers flocking to the small village for the Saturday evening nuptials.

Actors Ted Danson and Mary Steenburgen were walking hand-in-hand through the village, and fashion designer Vera Wang was spotted outside a restaurant.

The 30-year-old daughter of Bill Clinton and Hillary Rodham Clinton was expected to wed her boyfriend, investment banker Marc Mezvinsky, at a ceremony with 400 to 500 guests.