Lady Gaga was born Stefani Joanne Angelina Germanotta in New York City on March 28 , 1986 , the oldest child of Joseph Germanotta , internet businessman , and Cynthia . Lady Gaga was born Stefani Joanne Angelina Germanotta in New York City on March 28 , 1986 , the eldest child of Italian American Joseph Germanotta , an internet entrepreneur , and Cynthia ( nÃ e Bissett ) .