Clytemnestra (or Klytaimnestra) was a person in Greek mythology. She was the daughter of King Tyndareos of Sparta and his wife Leda. She was married to Agamemnon, King of Mycenae. With him she had children Iphigenia, Elektra, Orestes and Chrysothemis.
After the Trojan War, Clytemnestra and her lover Aegisthos killed Agamemnon. Agamemnon had sacrificed their daughter, Iphigenia, to the Gods to have wind to set sail for war. Clytemnestra and Aegisthos are later killed by her son Orestes.