马切洛·马斯楚安尼（Marcello Mastroianni，1924年9月28日－1996年12月19日），意大利国宝级演员、威尼斯影展艺术电影展影帝，1949年起在电影演出，曾经以《意大利式离婚》、《特别的一天》三次入围奥斯卡金像奖最佳男主角却未得奖；前妻是法国著名女影星凯撒琳·丹尼芙，两人女儿现仍是欧洲影星；马斯楚安尼以他温文儒雅微笑形象及演技，让一世代影迷印象深刻，与意大利大导演费里尼搭挡演出尤为人所称道；1996年癌症逝世。

Marcello Vincenzo Domenico Mastroianni, Knight Grand Cross (Italian pronunciation: [marˈtʃɛllo mastroˈjanni]; 28 September 1924 – 19 December 1996) was an Italian film actor. His prominent films include: La Dolce Vita; 8½; La Notte; Divorce, Italian Style; Yesterday, Today and Tomorrow; Marriage Italian-Style; The 10th Victim; A Special Day; City of Women; Henry IV; Dark Eyes; and Stanno tutti bene. His honours included British Film Academy Awards, Best Actor awards at the Cannes Film Festival and two Golden Globe Awards.