Q: Context: Kunal Nayyar (/ knl nar /; Punjabi: born 30 April 1981) is a British-Indian actor known for his role as Rajesh Koothrappali in the CBS sitcom The Big Bang Theory.

Question: who plays raj in the big bang theory? Let's give stream of consciousness first:
To answer the question, consider the following: Kunal Nayyar (/ knl nar /; Punjabi: born 30 April 1981) is a British-Indian actor known for his role as Rajesh Koothrappali in the CBS sitcom The Big Bang Theory. Therefore, the final answer is Kunal Nayyar.