- Top left: Ali Asghar Khan, the first prime minister of Iran.
- Top right: Mohammad Ali Foroughi, the prime minister who was in this position during the transfer of the monarchy to two kings.
- Bottom left: Amir-Abbas Hoveyda, the longest-serving prime minister of Iran.
- Bottom right: Mir-Hossein Mousavi, the last prime minister of Iran.
The office of Prime Minister of Iran was established in 1907 during the Persian Constitutional Revolution, and existed until 1989 when the office was abolished after a constitutional referendum. The prime minister was the head of government of Iran.
Ali Asghar Khan was the first and Mir-Hossein Mousavi was the last prime minister of Iran. Before the Constitutional Revolution, the head of government was called Grand Vizier (Sadr-e A'zam or Vazir-e A'zam).