Sir Anthony van Dyck (Dutch pronunciation: [vɑn ˈdɛik], many variant spellings; 22 March 1599 – 9 December 1641) was a Flemish Baroque artist who became the leading court painter in England after success in the Spanish Netherlands and Italy.

The seventh child of Frans van Dyck, a wealthy Antwerp silk merchant, Anthony painted from an early age. He was successful as an independent painter in his late teens, and became a master in the Antwerp guild in 1618. By this time he was working in the studio of the leading northern painter of the day, Peter Paul Rubens, who became a major influence on his work.

Van Dyck worked in London for some months in 1621, then returned to Flanders for a brief time, before travelling to Italy, where he stayed until 1627, mostly in Genoa. In the late 1620s he completed his greatly admired Iconography series of portrait etchings, mostly of other artists. He spent five years in Flanders after his return from Italy, and from 1630 was court painter for the archduchess Isabella, Habsburg Governor of Flanders. In 1632, he returned to London to be the main court painter, at the request of Charles I of England.

With the exception of Holbein, van Dyck and his contemporary Diego Velázquez were the first painters of pre-eminent talent to work mainly as court portraitists, revolutionising the genre. He is best known for his portraits of the aristocracy, most notably Charles I, and his family and associates. Van Dyck became the dominant influence on English portrait-painting for the next 150 years. He also painted mythological and biblical subjects, including altarpieces, displayed outstanding facility as a draughtsman, and was an important innovator in watercolour and etching.

His influence extends into the modern period. The Van Dyke beard is named after him. During his lifetime, Charles I granted him a knighthood, and he was buried in St Paul's Cathedral, an indication of his standing at the time of his death.