British-Indian actor Kunal Nayyar revealed that his first mainstream acting role was of a terrorist in police procedural drama television series 'CSI'.

Kunal Nayyar
Kunal Nayyar

The 34-year-old 'The Big Bang Theory' star was a part of 2016 Screen Actors Guild Awards' "I'm an Actor" segment where he had to share a personal story his craft, reported People magazine.

"My first professional acting job was playing a terrorist on a very popular TV show. I couldn't grow a mustache so they had to glue one on me. It was crooked.

"Then Mark Harmon punched me in the face. It was the greatest moment of my life. My name is Kunal Nayyar, and I am so proud to be an actor," he said.

Nayyar became famous for his portrayal of Raj Koothrappali, the shy astrophysicist on 'The Big Bang Theory'.