Actress Sushmita Sen will start her Bengali film career with Srijit Mukherjee's 'Nirbaak'. "In four days I am going to Kolkata to shoot for my first Bengali film and I am very excited about that. It's like a homecoming, it's like going back to my roots.", said the Bengali actress. The film also stars Jisshu Sengupta and Ritwick Chakraborty.