America watched as Chelsea Clinton, daughter and only child of former President Bill Clinton and Secretary of State Hillary Clinton, grew from precocious pre-teen to excited Stanford freshman and into a sleek, sophisticated woman, helping her mother campaign for president. Chelsea, who was just 12 years old when her father was elected as 42nd President of the United States, has grown from being a curly-haired girl playing soccer on the South Lawn of the White House to a blushing bride under the microscope of the world. Having announced their engagement in Nov. 2009, Chelsea and her longtime beau Marc Mezvinsky -- son of former Congressman Ed Mezvinsky, and former Congresswoman Marjorie Margolies-Mezvinsky -- were married on Saturday, July 31 in the wedding of the century in Rhinebeck, New York.