In Greek mythology, Rhea, Rhia or Rheia (/ˈriːə/; Ancient Greek: Ῥέα [r̥é.aː] or Ῥεία [r̥ěː.aː]) was one of the Titans, the children of Uranus (Sky) and Gaia (Earth). She was the sister and wife of Cronus, and by him, the mother of the six Olympians: Hestia, Demeter, Hera, Hades, Poseidon, and Zeus.
When Cronus learnt that he was destined to be overthrown by one of his children like his father before him, he swallowed all the children Rhea bore as soon as they were born. When Rhea had her sixth and final child, Zeus, she spirited him away and hid him in Crete, giving Cronus a rock to swallow instead, thus saving her youngest son who would go on to challenge his father's rule and rescue the rest of his siblings. Following Zeus's defeat of Cronus and the rise of the Olympian gods into power, Rhea withdraws from her role as the queen of the gods to become a supporting figure on Mount Olympus. She has some roles in the new Olympian era. She attended the birth of her grandson Apollo and raised her other grandson Dionysus. After Persephone was abducted by Hades, Rhea was sent to Demeter by Zeus. In the myth of Pelops, she resurrects the unfortunate youth after he has been slain.