Gian Galeazzo Ciano; 2nd Count of Cortellazzo and Buccari (18 March 1903 - 11 January 1944) was Foreign Minister of Fascist Italy from 1936 until 1943 and Benito Mussolini's son-in-law. On 11 January 1944; Count Ciano was shot by firing squad at the behest of his father-in-law; Mussolini; under pressure from Nazi Germany.

Ciano wrote and left behind a diary that has been used as a source by several historians; including William Shirer in his The Rise and Fall of the Third Reich.