Lucas Horenbout, often called Hornebolte in England (c. 1490/1495 – 1544), was a Flemish artist who moved to England in the mid-1520s and worked there as "King's Painter" and court miniaturist to King Henry VIII from 1525 until his death. He was trained in the final phase of Netherlandish illuminated manuscript painting, in which his father Gerard was an important figure, and was the founding painter of the long and distinct English tradition of portrait miniature painting. He has been suggested as the Master of the Cast Shadow Workshop, who produced royal portraits on panel in the 1520s or 1530s.