Margaretta Large Fitler Murphy Rockefeller (June 9, 1926 – May 19, 2015), best known as Happy Rockefeller, was the widow of Nelson Aldrich Rockefeller, who was the 41st Vice President of the United States and the Governor of New York. She was the Second Lady of the United States from December 1974 to January 1977. Before she was the Second Lady, she was the First Lady of New York from May 1963 to December 1973.