Costas Taktsis (Greek: Κώστας Ταχτσής) was a renowned Greek writer, born on 8 October 1927 and passing away on 25 August 1988. His work is celebrated as a landmark of post-war literature in Greece. Taktsis is best known for his novel, The Third Wedding (Greek: Το τρίτο στεφάνι, romanized: To tríto stefáni), which he partly wrote in Australia.

The novel unfolds in the years before and after World War II through the personal narratives of two women, Ekavi and Nina, who narrate their experiences in a direct and everyday language. Unable to find a publisher in Greece, Taktsis published the book at his own expense in 1962. The novel has since been translated into 18 languages. The French edition was released by Éditions Gallimard in 1967, translated by Jacques Lacarrière, and in 1969 it became the first Greek novel published by Penguin Books. A new English translation by John Chioles, titled The Third Wedding Wreath, was published by Hermes in 1985.

Several directors, including Michael Cacoyannis, attempted to adapt the book into a film, but without success. However, in 1995, Greek broadcaster ANT1 TV produced a television series based on the book, and in 2009–2010, a 4-hour theatre adaptation was produced by the National Theatre of Greece, directed by Stamatis Fassoulis.

Costas Taktsis was multilingual and translated ancient Greek dramas, particularly the comedies of Aristophanes such as The Frogs, The Clouds, The Birds, and Lysistrata, as well as other foreign literature. He was also a part of the editorial team of the pioneering literary magazine Pali from 1964 to 1967, alongside Nanos Valaoritis and others. One recurring theme in Taktsis's later works is homosexuality, which he sometimes portrayed as a facet of identity and at other times as a permanent curse.