Adrien (Hadrian) is an opera by the French composer Étienne Méhul. The libretto, by François-Benoît Hoffman, is closely based on Metastasio's Adriano in Siria. Written in 1791 and intended for performance at the Paris Opéra in 1792, the work was caught up in the turbulent political climate of the French Revolution and banned until 1799.

Étienne Nicolas Méhul was a French composer of the late classical and early romantic periods. He was known as "the most important opera composer in France during the Revolution". He was also the first composer to be called a "Romantic". He is known particularly for his operas, written in keeping with the reforms introduced by Christoph Willibald Gluck and Wolfgang Amadeus Mozart.