Vidya Balan, whose film count includes mostly female-oriented themes, says the film industry has changed over the years and coincidentally she has become the face of this change. \"I believe change doesn\'t happen overnight, it takes time. I am lucky that today when we are feeling the change, it\'s a coincidence that I have become a face of this change,\" she said. Balan, 33, gave strong performances in Ishqiya, Paa, No One Killed Jessica and The Dirty Picture. The actor, who will be seen next in Sujoy Ghosh\'s Kahaani, feels lucky to be present at a time when such stories are being written. \"I am lucky that I am getting a chance to be a part of such good films,\" said Balan, who had stormed the industry with her very first film, Parineeta, in 2005. Releasing March 9, Kahaani shows a pregnant woman\'s struggle to find her missing husband in Kolkata.