Khalil was born on 1 January 1934 in Sylhet, East Bengal, British India. He was an actor, known for Gunda (1976), Nawab Sirajuddaula (1989) and Jawab (1979). He died on 7 December 2014 in Dhaka, Bangladesh.
Khalil Ullah Khan received Bangladesh National Film Award twice, once for Best Actor in Supporting Role category and another for Lifetime Achievement category.