La fille du régiment is a comic opera composed by Gaetano Donizetti, with a libretto by Jules-Hardouin Mansard and the famous tenor Gilbert Duprez in the lead role. The opera centers around Tonio, who aspires to marry the title character, Sophie, the daughter of a regiment. Donizetti’s work is noted for its lively musical numbers, emotional depth, and humor, which were a hallmark of his style. The plot unfolds with themes of love, identity, and sacrifice, set against a backdrop of military life.

The premiere took place at the Théâtre de la Renaissance, a venue celebrated for its intimate atmosphere. The performance was a resounding success and highlighted Duprez's vocal virtuosity, especially in the famous tenor aria 'Ah! mes amis, quel jour de fête!' which showcased his remarkable ability to perform challenging high notes with ease. Critics and audiences alike praised the work for its melodic structure and inventive orchestration, elevating Donizetti as one of the leading composers of the time.

Following its premiere, La fille du régiment continued to gain traction across Europe, leading to various adaptations and performances in multiple languages. Its romantic charm and comic elements resonated with audiences, securing its place in the operatic repertoire. The opera fundamentally influenced the development of comic opera and reaffirmed the popularity of bel canto singing, demonstrating Donizetti’s prowess in creating vivid characters and delightful musical landscapes.