Leda was the daughter of Thestius and the wife of Tyndareus. She has been known as the Queen of Sparta. Leda was seduced by Zeus when he came to her in the form of a swan. Leda gave birth to an egg. From it hatched the Dioscuri, the twins Castor and Pollux. With Zeus she also had Helen and with Tyndareus she had Clytemnestra.