Ali Sadreddine Bayanouni (Arabic: علي صدر الدين البيانوني‎) is a Muslim Brotherhood leader in exile in London. He was born in 1938 (age 73–74) in Aleppo and brought up in a religious family, where his father and grandfather were both well known Muslim scholars. He joined the Muslim Brotherhood while in secondary school, in 1954, and went on to receive training as a lawyer. After spending time in prison, he emerged to become the deputy leader of the Brotherhood in 1977. He left Syria two years later and eventually settled in Jordan, where he remained for twenty years. He arrived in Britain as a political refugee in 2000, after the Jordanian authorities requested he leave the country.

In the wake of the unrest in Syria he has called for the end of the Bashar Al-Assad regime and the convention of "a free conference of all the nationalist forces in Syria" which would enable "Syrians to develop a collective national alternative".

Alī ibn Abī Ṭālib (Arabic: علي بن أﺑﻲ طالب, Transliteration: ʿAlī ibn Abī Ṭālib, [ʕaliː ibn ʔæbiː t̪ˤɑːlib]; 13^thRajab, 24 BH–21^stRamaḍān, 40 AH; approximately October 23, 598 or 600 or March 17, 599 – January 27, 661). The son of Abu Talib, Ali was also the cousin and son-in-law of Islamic prophet Muhammad, ruling over the Islamic Caliphate from 656 to 661, and was the first male convert to Islam.Sunnis consider Ali the fourth and final of the Rashidun (rightly guided Caliphs), while Shias regard Ali as the first Imam and consider him and his descendants the rightful successors to Muhammad, all of which are members of the Ahl al-Bayt, the household of Muhammad. This disagreement split the Ummah (Muslim community) into the Sunni and Shia branches.

Muslim sources, especially Shia ones, state that since Muhammad's time, Ali was the only person born in the Kaaba sanctuary in Mecca, the holiest place in Islam. His father was Abu Talib and his mother was Fatima bint Asad, but he was raised in the household of Muhammad, who himself was raised by Abu Talib, Muhammad's uncle, and Ali's father. When Muhammad reported receiving a divine revelation, Ali was the first male to accept his message, dedicating his life to the cause of Islam.