Kate Spade has died at age 55. The famed handbag designer, the namesake and co-founder of Kate Spade New York, was found dead Tuesday at her Park Avenue home on the Upper East Side, according to the New York Daily News. TMZ reported Spade was discovered at 10:20 a.m. ET. The designer was pronounced dead on the scene. Law enforcement sources told NBC News 4 a staff member found Spade hanged from a scarf. The circumstances surrounding her death are under investigation. Spade got her start in the fashion industry as a style editor for Mademoiselle magazine. She founded Kate Spade New York in 1993 with her business partner and future husband, Andy Spade, the brother of actor David Spade. Spade sold Kate Spade New York in 2007, but launched a new fashion brand, Frances Valentine, in 2016. She is survived by Andy and their daughter, Frances.