According to early sources Mor was born about 1516-21. He was from Utrecht, where he was a pupil of Jan van Scorel. Mor spent most of his career as court portraitist to the Habsburgs in Brussels, also travelling to Spain, Portugal and England. His name is often given in Spanish form, Antonio Mor. From about 1554 he lived in the Netherlands, in Utrecht, and from 1568 chiefly in Antwerp.