"I had a great experience working with Varun. He is a bundle of energy that inspires me," Nawazuddin said here on the sets of the TV show "Savdhaan India - India Fights Back".
The intense revenge drama, directed by Sriram Raghavan, features Nawazuddin in a negative role.
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He feels "thankful" as he has got to work with Raghavan, whom he calls "one of the brilliant directors of the country".
"I always wanted to work with him and I thank god that I got to work with him in a wonderful script like 'Badlapur'," he added.
Also starring Huma Qureshi, "Badlapur" will hit the theatres Feb 20.