Sayyed Muqtada al-Sadr (b. August 12, 1973) is the fourth son of the famous Iraqi Shi‘a cleric, Grand Ayatollah Mohammad Mohammad Sadeq al-Sadr and son-in-law of Grand Ayatollah Mohammad Baqir As-Sadr. As of early 2004, he was the de facto ruler of the Sadr City section of Baghdad and commanded the loyalty of the Mahdi Army, an insurgent force making a bid for power in Iraq