Electra, also spelt Elektra ( /ɪˈlɛktrə/ ;  Ancient Greek : Ἠλέκτρα, romanized: Ēléktrā, lit. ' amber '; [ɛː.lék.traː] ), is one of the most popular mythological characters in tragedies.  She is the main character in two Greek tragedies, Electra by Sophocles and Electra by Euripides. She is also the central figure in plays by Aeschylus, Alfieri, Voltaire, Hofmannsthal, and Eugene O'Neill.  She is a vengeful soul in The Libation Bearers , the second play of Aeschylus' Oresteia trilogy. She plans out an attack with her brother to kill their mother, Clytemnestra.
In psychology, the Electra complex is named after her.
Electra's parents were King Agamemnon and Queen Clytemnestra. Her sisters were Iphigeneia and Chrysothemis, and her brother was Orestes. In the Iliad , Homer is understood to be referring to Electra in mentioning "Laodice" as a daughter of Agamemnon. 
Electra was absent from Mycenae when her father, King Agamemnon, returned from the Trojan War. When he came back, he brought with him his war prize, the Trojan princess Cassandra, who had already borne him twin sons. Upon their arrival, Agamemnon and Cassandra were murdered, by either Clytemnestra herself, her lover Aegisthus, or both. Clytemnestra had held a grudge against her husband for sacrificing their eldest daughter, Iphigenia, to the goddess Artemis in exchange for a fair wind so that he could set sail for Troy. In some versions of this story, Iphigenia was saved by the goddess at the last moment.
Eight years later, Electra returned home from Athens at the same time as her brother, Orestes. ( Odyssey , iii. 306; X. 542). According to Pindar (Pythia, xi. 25), Orestes was saved either by his old nurse or by Electra, and was taken to Phanote on Mount Parnassus, where King Strophius took charge of him. When Orestes was twenty, the Oracle of Delphi ordered him to return home and avenge his father's death.
According to Aeschylus, Orestes recognized Electra's face before the tomb of Agamemnon, where both had gone to perform rites to the dead, and they arranged how Orestes should accomplish his revenge.  Orestes and his friend Pylades, son of King Strophius of Phocis and Anaxibia, killed Clytemnestra and Aegisthus (in some accounts with Electra helping).
Before her death, Clytemnestra cursed Orestes. The Erinyes or Furies, whose duty it is to punish any violation of the ties of family piety, fulfill this curse with their torment. They pursue Orestes, urging him to end his life. Electra was not hounded by the Erinyes.
In Iphigeneia in Tauris , Euripides tells the tale somewhat differently. In his version, Orestes was led by the Furies to Tauris on the Black Sea, where his sister Iphigenia was being held. The two met when Orestes and Pylades were brought to Iphigenia to be prepared for sacrifice to Artemis. Iphigeneia, Orestes, and Pylades escaped from Tauris. The Furies, appeased by the reunion of the family, abated their persecution. Electra then married Pylades. 
In Greek mythology, Agamemnon was a king of Mycenae who commanded the Greeks during the Trojan War. He was the son, or grandson, of King Atreus and Queen Aerope, the brother of Menelaus, the husband of Clytemnestra and the father of Iphigenia, Electra, Laodike (Λαοδίκη), Orestes and Chrysothemis. Legends make him the king of Mycenae or Argos, thought to be different names for the same area. Agamemnon was killed upon his return from Troy, either by his wife's lover Aegisthus or by his wife herself.
Aegisthus was a figure in Greek mythology. Aegisthus is known from two primary sources: the first is Homer's Odyssey, believed to have been first written down by Homer at the end of the 8th century BCE, and the second from Aeschylus's Oresteia, written in the 5th century BCE. Aegisthus also features heavily in the action of Euripides's Electra, although his character remains offstage.
In Greek mythology, Orestes or Orestis was the son of Clytemnestra and Agamemnon, and the brother of Electra. He is the subject of several Ancient Greek plays and of various myths connected with his madness and purification, which retain obscure threads of much older ones.
In Greek mythology, Iphigenia was a daughter of King Agamemnon and Queen Clytemnestra, and thus a princess of Mycenae.
In Greek mythology, Pylades was a Phocian prince as the son of King Strophius and Anaxibia who is the daughter of Atreus and sister of Agamemnon and Menelaus. He is mostly known for his relationship with his cousin Orestes, son of Agamemnon.
In Greek mythology, Atreus was a king of Mycenae in the Peloponnese, the son of Pelops and Hippodamia, and the father of Agamemnon and Menelaus. Collectively, his descendants are known as Atreidai or Atreidae.
The Oresteia is a trilogy of Greek tragedies written by Aeschylus in the 5th century BCE, concerning the murder of Agamemnon by Clytemnestra, the murder of Clytemnestra by Orestes, the trial of Orestes, the end of the curse on the House of Atreus and the pacification of the Furies.
Electra is a 1962 Greek film based on the play Electra, written by Euripides. It was directed by Michael Cacoyannis, as the first installment of his "Greek tragedy" trilogy, followed by The Trojan Women in 1971 and Iphigenia in 1977. It starred Irene Papas in the lead role as Elektra, and Giannis Fertis as Orestis.
Electra,Elektra, or The Electra is a Greek tragedy by Sophocles. Its date is not known, but various stylistic similarities with the Philoctetes and the Oedipus at Colonus lead scholars to suppose that it was written towards the end of Sophocles' career. Jebb dates it between 420 BC and 414 BC.
Iphigenia in Tauris is a drama by the playwright Euripides, written between 414 BC and 412 BC. It has much in common with another of Euripides's plays, Helen, as well as the lost play Andromeda, and is often described as a romance, a melodrama, a tragi-comedy or an escape play.
Euripides' Electra is a play probably written in the mid 410s BC, likely before 413 BC. It is unclear whether it was first produced before or after Sophocles' version of the Electra story.
The Flies is a play by Jean-Paul Sartre, produced in 1943. It is an adaptation of the Electra myth, previously used by the Greek playwrights Sophocles, Aeschylus and Euripides. The play recounts the story of Orestes and his sister Electra in their quest to avenge the death of their father Agamemnon, king of Argos, by killing their mother Clytemnestra and her husband Aegisthus, who had deposed and killed him.
Iphigenia in Tauris is a reworking by Johann Wolfgang von Goethe of the ancient Greek tragedy Ἰφιγένεια ἐν Ταύροις by Euripides. Euripides' title means "Iphigenia among the Taurians", whereas Goethe's title means "Iphigenia in Taurica", the country of the Tauri.
Orestes (408 BCE) is an Ancient Greek play by Euripides that follows the events of Orestes after he had murdered his mother.
Clytemnestra, in Greek mythology, was the wife of Agamemnon, king of Mycenae, and the twin sister of Helen of Troy. In Aeschylus' Oresteia, she murders Agamemnon – said by Euripides to be her second husband – and the Trojan princess Cassandra, whom Agamemnon had taken as a war prize following the sack of Troy; however, in Homer's Odyssey, her role in Agamemnon's death is unclear and her character is significantly more subdued.
Reflections of the Oresteia in the arts and popular culture show the influence of the classic trilogy of tragedies by Aeschylus.
Electra is a two-act play written in 1937 by French dramatist Jean Giraudoux. It was the first Giraudoux play to employ the staging of Louis Jouvet. Based on the classic myth of antiquity, Electra has a surprisingly tragic force, without losing the spirit and sparkling humor that made Jean Giraudoux one of the most important playwrights of the mid twentieth century.
Orestes Pursued by the Furies is an event from Greek mythology that is a recurring theme in art depicting Orestes.
Agamemnon is a fabula crepidata of c. 1012 lines of verse written by Lucius Annaeus Seneca in the first century AD, which tells the story of Agamemnon, who was killed by his wife Clytemnestra in his palace after his return from Troy.
In the Iliad, Iphianassa is an obscure and controversial daughter of Agamemnon and Clytaemnestra, sister to Laodice and Chrysothemis, sometimes considered identical to Iphigeneia.