The entire town has been sworn to secrecy, but many storefront windows bear signs saying "Congratulations Marc & Chelsea" and similar messages.
"You could make a case that this is the most significant thing to happen in Rhinebeck since Washington's army drove the British out of Rhinebeck back in the 1700s," said Jim Langon, editor of the Hudson Valley News newspaper, who was the first to report that the wedding would take place there.
The parents of the bride, Secretary of State Hillary Clinton and President Clinton, were seen arriving at a formal dinner at the Beekman Arms Inn in Rhinebeck on Friday night.
Also attending were former Secretary of State Madeleine Albright, presidential adviser Vernon Jordan and numerous young couples presumed to be friends of the bride and groom.
"This is the wedding of the century," wedding planner Tatiana Byron said.