Hilary Duff was born in Houston, Texas on September 28, 1987.
Hilary Duff is the 2nd child of Susan Colleen (née Cobb) and husband Robert Erhard Duff.
Hilary Duff's mother is a homemaker and a film producer.
Hilary Duff's father is a partner in a chain of convenience stores, who resides at the family home in Houston to maintain the family's convenience store business.
Hilary Duff has an elder sister, Haylie Duff. Haylie Duff is also an actress/singer.