Description : Who is Hilary Duff's sister?
Last Answer : Hilary Duff does not have a twin sister. However she does have a sister who is two and a half years older than her. Her name is Haylie Duff and she is an actress as well. Some of the movies she ... Christmas Eve, Slightly Single in L.A., Material Girls, Holiday Engagement, A Love/Like Ours, etc.....