Louis-Hyacinthe Duflost (15 April 1814 – 8 May 1887), known as Hyacinthe, was a French actor and operetta singer.

Born in Amiens, he became a comic actor very early in life – his father was wigmaker to the magician Louis Compte, whose troupe he joined aged seven.

In 1847 he moved to the company of the Palais-Royal, where he remained until his death and appeared very regularly in plays by Eugène Labiche.

His reputation was partly founded on his large nose, remembered by Parisians long after his death.

He lived in Montmartre with his wife and children, most notably during the siege of Paris, when he joined the 32nd Battalion of the Garde Nationale aged 60.