Jean-Claude Chambellan Duplessis (1699 — 1774), called Duplessis père to distinguish him from his son, Jean-Claude-Thomas Chambellan Duplessis (c. 1730 — 1783), was a goldsmith, sculptor and ceramics modeller, bronze-founder and decorative designer working in the Rococo manner. He served as artistic director of the Vincennes porcelain manufactory and its successor at Sèvres from 1748 to his death in 1774 and as royal goldsmith (orfèvre du Roi) from 1758 to 1774.
He was born in Turin, as Giovanni Claudio Ciambellano. His earliest work in Turin was carried out for the Prince de Carignan and other members of the house of Savoy. He arrived in Paris in the suite of Victor Amadeus I, Prince of Carignan who ran away to Paris in 1718 and set up an extravagant establishment at the Hôtel de Soissons. When Carignan returned to Turin, Duplessis placed himself under the protection of Marc-René de Voyer de Paulmy d'Argenson (1722–1787), who obtained for him workshop lodgings in the galeries du Louvre as a privileged worker not bound by the rules of the Paris guilds, which would not have accepted a foreign-born craftsman.