Actress Vidya Balan says it is very important for an actor to be shameless and fearless. Vidya is looking forward to her film "Tumhari Sulu". The story of "Tumhari Sulu" -- releasing on November 17 -- revolves around a middle-aged ordinary housewife Sulochona aka Sulu who is a happy-go-lucky person with an extraordinary calibre. For Vidya, "Tumhari Sulu" is a happy film.