Адам If I were King

If I were King (Si j'étais roi) is the name of a three-act opéra-comique composed by Adolphe Adam to a libretto by Adolphe d'Ennery and Jules-Henri Brésil. It had its premiere at the Théâtre Lyrique of Paris, in 1852. It was a success, reaching over 170 performances in its first ten years. Though less popular than Le postillon de Lonjumeau, it is often regarded as Adam's finest work.