Mirza Tahir Ahmad, Indian-English caliph and author (d. 2003)
Mirza Tahir Ahmad (Urdu: مرزا طاہر احمد‎) (18 December 1928 – 19 April 2003) was the fourth caliph (Arabic: خليفة المسيح الرابع, khalīfatul masīh al-rābi) and the head of the worldwide Ahmadiyya Muslim Community. He was elected as the fourth successor of the founder of the community, Mirza Ghulam Ahmad. He was elected on 10 June 1982, the day after the death of his predecessor, Mirza Nasir Ahmad.

Following the Ordinance XX that was promulgated by the government of Pakistan in 1984, which prohibited Ahmadi Muslims from any public expression of the Islamic faith, Tahir Ahmad left Pakistan and migrated to London, England, provisionally moving the headquarters of the community to the Fazl Mosque in London. He is noted particularly for his question and answer sessions which he held regularly with people from around the world and for his Quranic discourses. Under his leadership, there was an acceleration in the number of Quran translations produced by the Community; and during his caliphate, the Community experienced structural and financial growth on an international level, including the launch of the first Muslim satellite television network, Muslim Television Ahmadiyya in 1994 through which he could communicate televised messages to the Community globally and have his sermons and other public engagements transmitted throughout the world through this medium.Tahir Ahmad also authored many books including, Some Distinctive Features of Islam; Christianity: A Journey from Facts to Fiction; Murder in the Name of Allah, and his magnum opus Revelation, Rationality, Knowledge & Truth.