Dhia' ul-Din 'Abd al-Malik ibn Yusuf al-Juwayni al-Shafi'i (Persian: ???? ??????? ????????? ???????? ??? ???? ????? ??????, 17 February 1028— 19 August 1085; 419—478 AH) was a Persian Sunni Shafi'i jurist and mutakallim theologian.
His name is commonly abbreviated as Al-Juwayni; he is also commonly referred to as Imam al Haramayn, meaning "leading master of the two holy cities", that is, Mecca and Medina.