Haylie Katherine Duff (born February 19, 1985) is an American actress and singer. She is best known for her roles as Sandy Jameson in the television series 7th Heaven, Amy Sanders in Lizzie McGuire and Summer Wheatly in Napoleon Dynamite. Duff is a food blogger and hosted a cooking show, The Real Girl's Kitchen, in 2014. She is the older sister of Hilary Duff.
