7. Chelsea Clinton and Marc Mezvinsky – $3 million

Chelsea Clinton, the daughter of former U.S. President Bill Clinton and former Secretary of State and Senator Hillary Clinton, married investment banker Marc Mevinsky in a $3 million ceremony. 

The couple tied the knot in 2010 in New York, at a 40,000-square-foot venue with 400 guests in attendance. Chelsea wore a Vera Wang wedding dress, accessorized with diamond earrings and a $25,000 waist piece.