Hilary’s birth name is Hilary Erhard Duff. She was born on September 28th, 1987. Hilary was born in Houston, Texas. Her parents names are Bob and Susan Duff. She has a sister named Haylie. Hilary go t nick named Hil. She is in the show Agent Cody Banks. Hilary has acted in the movie A Cinderella Story. There are a book series that she stars in. The books are Lizzie McGuire.