Hathaway was born in Brooklyn, New York, and moved to Millburn, New Jersey, when she was six years old. She is the daughter of Gerald Hathaway, a lawyer, and Kate McCauley, an actress who inspired Hathaway to follow in her footsteps. She was named after the wife of playwright William Shakespeare. She has an older brother, Michael, and a younger brother, Thomas. Hathaway has mainly Irish and French ancestry, with more distant German and Native American roots. She was raised in the Catholic religion with what she considers "really strong values," and wanted to be a nun during her childhood. However, at fifteen, she decided not to become a nun after learning that her brother Michael was gay. Although she was raised as a Catholic, she felt that she could not be part of a religion that disapproved of her brother's sexual orientation. She has stated that she is a non-denominational Christian. As a teenager, she actually spent many of her summers going to a Christian camp called Camp Johns