He was a king of Pherae in Thessaly, succeeding his father Pheres after whom the city was named. Admetus was one of the Argonauts and took part in the Calydonian Boar hunt. His wife Alcestis offered to substitute her own death for his.
The greatest aid Apollo gave to Admetus was persuading the Fates to reprieve Admetus of his fated day of death. According to Aeschylus Apollo made the Fates drunk, and the Fates agreed to reprieve Admetus if he could find someone to die in his place. Admetus initially believed that one of his aged parents would happily take their son's place of death. When they were unwilling, Alcestis instead died for Admetus.
Apollo helping Admetus in yoking a lion and a boar to a chariot (in pursue of the hands of Alcestis from her father)