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Deewaar, starring Amitabh Bachchan, is renowned for its gritty realism, a style of filmmaking that emphasizes authenticity and depicts life as it is, often dealing with social issues and the struggles of ordinary people. The film's screenplay, written by Javed Akhtar, captures this essence by presenting raw and realistic portrayals of characters and their circumstances, making it a highly acclaimed and influential work in Indian cinema.