Sayyid Muhammad-Mahdi al-Husayni al-Modarresi (born 1977), also known as Sayed Mahdi al-Modarresi, is an Iraqi-Australian Shia scholar, author and orator. He comes from a distinguished family of scholars which includes supreme religious jurists, such as Grand Ayatollah Sayyid Muhammed-Taqi al-Modarresi, one of Iraq's leading faith leaders of its majority Shia population. He has led prayers at the United States House of Representatives, and delivers lectures around the world. al-Modarresi is an expert in interfaith relations, he leads Interpath, a unique outreach program designed to strengthen ties between Muslims and other major faith traditions.