Edgar is an operatic dramma lirico in three acts by Giacomo Puccini to an Italian libretto by Ferdinando Fontana, freely based on the play in verse La Coupe et les lèvres by Alfred de Musset.

Giacomo Puccini was an Italian composer known primarily for his operas. Regarded as the greatest and most successful proponent of Italian opera after Verdi, he was descended from a long line of composers, stemming from the late-Baroque era. Though his early work was firmly rooted in traditional late-19th-century Romantic Italian opera, he later developed his work in the realistic verismo style, of which he became one of the leading exponents.