Irene Papas or Irene Pappas; born Eirini Lelekou (Greek: Ειρήνη Λελέκου, romanized: Eiríni Lelékou); Chiliomodi, Corinthia, 3 September 1929 – Chiliomodi, Corinthia, 14 September 2022) was a Greek actress and singer who starred in over 70 films in a career spanning more than 50 years. She gained international recognition through such popular award-winning films as The Guns of Navarone (1961), Zorba the Greek (1964) and Z (1969). She was a powerful protagonist in films including The Trojan Women (1971) and Iphigenia (1977). She played the title roles in Antigone (1961) and Electra (1962). She had a fine singing voice, on display in the 1968 recording Songs of Theodorakis.
Papas won Best Actress awards at the Berlin International Film Festival for Antigone and from the National Board of Review for The Trojan Women. Her career awards include the Golden Arrow Award in 1993 at Hamptons International Film Festival, and the Golden Lion Award in 2009 at the Venice Biennale.
In 1947 she married the film director Alkis Papas; they divorced in 1951. In 1954 she met the actor Marlon Brando and they had a long love affair, which they kept secret at the time. Fifty years later, when Brando died, she recalled that "I have never since loved a man as I loved Marlon. He was the great passion of my life, absolutely the man I cared about the most and also the one I esteemed most, two things that generally are difficult to reconcile". Her second marriage was to the film producer José Kohn in 1957; that marriage was later annulled. She was the aunt of the film director Manousos Manousakis and the actor Aias Manthopoulos.
In 2003 she served on the board of directors of the Anna-Marie Foundation, a fund which provided assistance to people in rural areas of Greece. In 2013 she began to suffer from Alzheimer's disease. Papas spent her final years in Chiliomodi. She died there on 14 September 2022, at the age of 93.