Susan Duff is the mother of actress/singer Hilary Erhard Duff, born on September 28th, 1987, and actress/singer Haylie Katherine Duff, born on February 19th,…more
Susan and her husband, Bob, were unsure what to name their second daughter, as she was 7-1/2 weeks early. The name wound up being Hilary Erhard Duff, with the middle name coming from Susan's mother's maiden name.
Susan: (to younger daughter, Hilary, reminding her about how she was as a young child) You always knew what you wanted and were relentless at getting it.