In the Percy Jackson universe, the Big Three are the three most powerful Olympian gods: Zeus, Poseidon, and Hades.

Who the Big Three Are

  • Zeus – God of the sky and thunder, king of the gods, and father of Thalia Grace in the series.
  • Poseidon – God of the sea and earthquakes, and father of Percy Jackson himself.
  • Hades – God of the Underworld, ruling over the dead and father of demigods like Nico and Bianca di Angelo in the broader canon.

Why They Matter in Percy Jackson

  • The Big Three are considered the most powerful Olympians and are all sons of Kronos and Rhea.
  • A prophecy says that a child of the Big Three will make a choice at sixteen that could save or destroy Olympus, which is what puts Percy, Thalia, and other related demigods at the center of the story’s danger.

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