Happy Rockefeller, American philanthropist, 31st Second Lady of the United States (died 2015)

Margaretta Large "Happy" Rockefeller was a philanthropist who, as the wife of the 41st vice president of the United States, Nelson Rockefeller, served as second lady of the United States from 1974 to 1977. She was previously the first lady of New York from 1963 to 1973, during her husband's last three terms in office.

The second lady of the United States or second gentleman is the informal title held by the spouse of the vice president of the United States, concurrent with the vice president's term of office. Coined in contrast to "first lady" – albeit used less commonly – the title "second lady" was apparently first used by Jennie Tuttle Hobart to refer to herself. The first second gentleman of the United States was Doug Emhoff, the husband of Kamala Harris, the vice president from 2021 to 2025 and first woman in the position.