Hasan Ali Shah, known as Aga Khan I, was the 46th imam of the Nizari Isma'ilis. He served as the governor of Kirman and a prominent leader in Iran and later in the Indian subcontinent. He was the first Nizari imam to hold the title Aga Khan.

Aga Khan is a title held by the Imām of the Nizari Ismāʿīli Shias. Since 1957, the holder of the title has been the 49th Imām, Prince Shah Karim al-Husseini, Aga Khan IV. Aga Khan claims to be a direct descendant of Muhammad, the last prophet according to the religion of Islam.