Atys (Greek: Ἄτυς) was the son of Croesus king of Lydia.
As a result, Croesus, seeking to prevent or stave off the foreseen fate, had his son married immediately and ceased sending him out to war.
Croesus initially was unwilling to allow Atys to participate, but Atys talked his father into letting him go with a team of chosen young men and hounds to drive it off, arguing that boars do not wield iron weapons.
Croesus gave his consent, but he sent Adrastus with him as a body guard.
During the hunt, Adrastus accidentally killed Atys when hurling a spear at the boar, thus Croesus's dream came to pass.