The Iranian Embassy siege took place from 30 April to 5 May 1980, after a group of six armed men stormed the Iranian embassy on Prince's Gate in South Kensington, London. The gunmen, Iranian Arabs campaigning for sovereignty of Khuzestan Province, took 26 people hostage, including embassy staff, several visitors, and a police officer who had been guarding the embassy. They demanded the release of prisoners in Khuzestan and their own safe passage out of the United Kingdom. The British government quickly decided that safe passage would not be granted and a siege ensued. Subsequently, police negotiators secured the release of five hostages in exchange for minor concessions, such as the broadcasting of the hostage-takers' demands on British television.

The Embassy of Iran in London is the diplomatic mission of Iran in the United Kingdom. It is located in a terrace overlooking Hyde Park in South Kensington, Westminster, London, next to the embassy of Ethiopia. Iran also maintains a Consular Section at 50 Kensington Court, South Kensington. The embassy building, along with the Ethiopian Embassy and the Polish Institute and Sikorski Museum, is one of a group of Grade II listed stucco buildings.