Echion (Ancient Greek: Έχίων), also known as Aetion, was a celebrated Greek painter spoken of by Lucian, who gives a description of one of his pictures, representing the marriage of Alexander and Roxana. This painting excited such admiration when exhibited at the Olympic Games, that Proxenidas, one of the judges, gave the artist his daughter in marriage. Echion seems to have excelled particularly in the art of mixing and laying on his colors. It has commonly been supposed that he lived in the time of Alexander the Great; but the words of Lucian show clearly that he must have lived about the time of Hadrian and the Antonines. Aloys Hirt supposes that the name of the painter of Alexander's marriage, whom Lucian praises so highly, as Aetion, is a corruption of Echion.