"Nessun dorma" (Italian: [nesˌsun ˈdɔrma]; lit. 'Let no one sleep') is an #aria from the final act of Italian composer #GiacomoPuccini's opera #Turandot (text by #GiuseppeAdami and #RenatoSimoni) and one of the best-known #tenor arias in all #opera. It is sung by Calaf.