Mir-Hossein Mousavi on 2 March 1942 in Khameneh, East Azerbaijan, Iran. He is an ethnic Azerbaijani, whose family originated from Tabriz. His father, Mir-Ismail, was a tea merchant from Tabriz. Mousavi grew up in Khameneh, and moved to Tehran following his graduation from high school in 1958. Mousavi is a relative of fellow Khameneh native Ali Khamenei: Mousavi's grandmother is Khamenei's paternal aunt. He earned his undergraduate degree in architecture from the National University of Tehran (now Shahid Beheshti University), and in 1969 was awarded his master's degree in architecture from the National University of Tehran, focusing primarily on traditional Iranian architecture.
Mir-Hossein Mousavi as well as the conservative newspaper "Jomhouri-e Eslami", supported Mousavi's candidacy, he did not receive the official backing of any major conservative party. His candidacy made it harder for the conservatives to support Mahmoud Ahmadinejad, and large conservative parties, such as the Combatant Clergy Association, did not back the current President for a second term of office. Mousavi had on numerous occasions indicated his wish to change the constitution in order to remove the existing ban on the private ownership of television stations (currently all Iranian television stations are state-owned), as well as transfer the control of the law-enforcement forces