The Paris Opéra hired La Maupin in 1690, having initially refused her. She befriended an elderly singer, Bouvard, and he and Thévenard convinced Jean-Nicolas de Francine, master of the king's household, to accept her into the company. She debuted as Pallas Athena in "Cadmus et Hermione" by Jean-Baptiste Lully the same year. She performed regularly with the Opéra, first singing as a soprano, and later in her more natural contralto range. The Marquis de Dangeau wrote in his journal of a performance by La Maupin given at Trianon of Destouches' "Omphale" in 1701 that hers was "the most beautiful voice in the world".