Admetus, in Greek mythology, a king of Pherae, in Thessaly, who took part in the Caly-donian hunt and the Argonautic expedition. He is said to have obtained, through the intercession of Apollo, deliverance from death, on condition that his father, mother, or wife should voluntarily die for him. This was cheerfully complied with by his wife Alcestis, daughter of Pellas, who was subsequently rescued from the hands of Pluto by Hercules and restored to Admetus.