Adrastus (Greek: Ἄδραστος; Ionic: Adrestus Ἄδρηστος) was the son of Gordias, king of Phrygia.
The Mysians sent messengers to the house of Croesus asking the king to send his son Atys with a party of men and dogs to aid them.
Croesus initially refused to send his son, having had a dream warning of Atys's young death upon an iron spearpoint, but Atys succeeded in convincing him to let him go, making the point that no boar could wield an iron spear.
Upon finding the boar, the party surrounded it in a circle and hurled spears at it; however, Adrastus missed his target and struck Atys a mortal blow.
When the group came back bearing Atys's body, Adrastus held his hands out to King Croesus in supplication – he begged that he himself be ritually slaughtered over the prince's body, saying that he could no longer go on living with the blood-guilt of yet another person on his hands.