West Bengal is a state in the eastern region of India and is the nation's fourth-most populous. The state capital is Kolkata. The state encompasses two broad natural regions: the Gangetic Plain in the south and the sub-Himalayan and Himalayan area in the north. The tourism in West Bengal is maintained by WBTDCL, a state government owned enterprise. Currently Bollywood star Shah Rukh Khan is the brand ambassador of West Bengal Tourism. The promotional films on West Bengal have been directed by Shah Rukh Khan Indian National Award winning filmmaker Aniruddha Roy Chowdhury.