(28 September 1597 - 23 April 1681), also known as Giusto Sustermans, was a Flemish painter in the Baroque style. He was born in Antwerp and died in Florence.
Sustermans is chiefly notable for his portraits of members of the Medici family as he was their court painter. His work can be found in both the Palatina Gallery and the Uffizi Gallery in Florence, and in many other galleries around the globe. During his lifetime he was feted as the finest portrait painter in Italy.