Zinta was the female lead in India's three highest-grossing films of 2003: The Hero: Love Story of a Spy, Koi... Mil Gaya and Kal Ho Naa Ho. The Hero, co-starring Sunny Deol and Priyanka Chopra, is a patriotic drama about a spy network involving terrorists and an Indian army officer. Zinta played the part of Reshma, a villager who falls in love with the officer and becomes part of this network. The film, involving stunts never seen before in the cinematic history of Bollywood, became the most expensive Hindi film ever produced at the time. Despite being the third highest-grossing film of that year, it failed to recover its production costs at the box office. She next starred in Honey Irani's directorial debut, Armaan, alongside Amitabh Bachchan and Anil Kapoor. This drama is set in a hospital and follows the travails of its personnel and its principal, Dr. Akash, who struggles arduously to sustain the institution financially. Zinta played Akash's schizophrenic wife Sonia Kapoor. The