"Kandahar" is based on the screenplay Waugh developed with former military intelligence officer Mitchell LaFortune.
Details of Ali Fazal's character in 'Kandahar' are still under wraps. Gerard Bulter, 52, will play Tom Harris, a CIA operative working in the Middle East.
Ali Fazal, who has acted in international movies like 'Furious 7', 'Victoria and Abdul', expressed his excitement on being part of 'Kandahar'.
Whether the elderly cleric is alive or dead is something many Afghans are uncertain about, and even the most dedicated analysts have doubts about who is really leading the group.
The Taliban on Thursday overran Afghanistan's second and third largest cities, Kandahar and Herat, days after the United States completed most of its withdrawal from a 20-year military involvement.
The latest US assessment suggests Kabul could come under insurgent pressure within 30 days and that, if current trends hold, the Taliban could gain full control of the country within a few months.
Provincial police spokesman Jamal Naser Barekzai blamed the Taliban for the attack, although the militants denied responsibility.
Violence has escalated in Afghanistan in recent weeks as the Taliban have intensified their offensive against civilians, Afghan defense and security forces.
A special aircraft of the Indian Air Force was sent on Saturday to bring back the Indian diplomats, officials and other staff members including a group of Indo-Tibetan Border Police personnel.
Kandahar province was the birthplace of the Taliban and has in recent months seen intense clashes between militants and Afghan forces.
Sixteen others were wounded, including foreign and Afghan security forces, when a bomb-laden car exploded in the southern province of Kandahar.