Marella Agnelli (Italian pronunciation: [ma'r?lla a?'??lli]; born Donna Marella Caracciolo di Castagneto ['d?nna ma'r?lla ka'ratt?olo di kasta?'?e?to]; 4 May 1927 – 23 February 2019) was an Italian noblewoman, art collector, socialite, style icon and widow 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.