《今夜无人入睡》（意大利文：Nessun dorma）是普契尼最后一部歌剧《zh-cn:图兰多》的咏叹调，由男角卡拉夫王子（Calaf）演唱，诉说杜兰朵公主要全城彻夜不睡，在天亮前替她寻找王子的名字，若无法如期查出，则全城百姓都必须受死。歌曲的原意为「不让人入睡」，中译为「今夜无人入睡」或「公主彻夜未眠」。这首古典歌剧作品是著名男高音帕华洛帝（Luciano Pavarotti）的经典金曲，1990年被英国广播公司（BBC）用作当年意大利世界杯足球赛的主题曲后，令它的知名度更广为人知。

"Nessun dorma" (Italian: [nesˈsun ˈdɔrma]; English: "None shall sleep") is an aria from the final act of Giacomo Puccini's frequently performed opera Turandot and is one of the best-known tenor arias in all opera. It is sung by Calaf, il principe ignoto (the unknown prince), who falls in love at first sight with the beautiful but cold Princess Turandot. However, any man who wishes to wed Turandot must first answer her three riddles; if he fails, he will be beheaded. In the aria, Calaf expresses his triumphant assurance that he will win the princess.