Marella Agnelli (Italian pronunciation: [maˈrɛlla aɲˈɲɛlli]; born Donna Marella Caracciolo dei Principi di Castagneto [ˈdɔnna maˈrɛlla kaˈrattʃolo di kastaɲˈɲeːto]; 4 May 1927 – 23 February 2019) was an Italian noblewoman, art collector, socialite, style icon and wife of Fiat chairman Gianni Agnelli. She often appeared in the fashion magazine Vogue. She was named to the International Best Dressed List Hall of Fame in 1963.