Mohammad Reza Pahlavi, commonly referred to in the Western world as Mohammad Reza Shah, or just simply The Shah, was the last monarch of Iran. He began ruling the Imperial State of Iran after succeeding his father Reza Shah in 1941 and remained in power until he was overthrown by the 1979 Iranian Revolution, which abolished the country's monarchy and established the Islamic Republic of Iran. In 1967, he took up the title Shahanshah and held several others, including Aryamehr and Bozorg Arteshtaran.

Pahlavi Iran, officially the Imperial State of Persia until 1935 and the Imperial State of Iran from 1935 to 1979, was the Iranian state under the rule of the Pahlavi dynasty. The Pahlavi dynasty was created in 1925 and lasted until 1979, when it was ousted as part of the Islamic Revolution, which ended Iran's continuous monarchy and established the current Islamic Republic of Iran.