The actor, who has worked in movies like "Escape from Taliban", "Stumped" and "Shhh", is excited about the film based on the life of slain Wall Street Journal reporter Daniel Pearl but refuses to talk about his character.
"It was a great experience. I am playing an important character in the film but cannot talk about it right now," Khan, who was in the capital, told in an interview.
Pearl was kidnapped and murdered in Pakistan in 2002 while investigating Islamists in the aftermath of 9/11. Actor Dan Futterman plays Pearl. Hollywood star Angelina Jolie plays Pearl's wife Mariane. Khan, who's relocated to Britain, recently finished a series "Sharpe's Challage" for ITV (Independent Television) and "The Bill" for BBC.
"In 'Sharpe's Challenge' I am opposite actor Sean Bean. The series is based on the East India Company. It has been shot in Rajasthan and I am playing the lead character of Lt. Mohan Singh," said Khan.
"In 'The Bill', I play a character called Tariq Mustafa-Ali. It was great fun and a learning experience working in these serials," he added.
For Khan, it doesn't matter whether he's walking the ramp, acting in films or television. What matters is just good work.
"I just want to do good work. We all are human beings and I find that no one is really simple so I want to enact complicated roles. I am looking for interesting characters not challenging ones. An interesting character may or may not be challenging."
Apart from his acting, Khan has acquired skills like horse riding and swordplay. But he says he is always cautious about safety.
"The knowledge I have gained helps me concentrate on other aspects of acting. But I always ensure safety and avoid being stupid," said Khan.
Not many, however, know that the intense actor is quite superstitious in real life.
"I respect most superstitions. I have few quirks like I never walk under a ladder. Why mess with fate?"
Though Khan is interested in directing films in the future, he has no concrete plans right now.
"I would love to write and direct but I am not actively working towards it now. Except life and my baby... nothing else is in the pipeline."