Cornelis Troost (8 October 1696 – 7 March 1750) was an 18th-century actor and painter from Amsterdam. Troost was trained as an actor and married the actress Susanna Maria van der Duyn, but became a pupil of Arnold Boonen and gave up his career for painting in 1723. A famous work, in his favorite medium of pastel and watercolor, is a five picture series entitled NELRI (Mauritshuis, The Hague, 1740). The name is derived from the first letters of the Latin inscriptions which accompany five views of the activities of a group of men during a night of reunion. * * * *