Bollywood diva Aishwarya Bachchan is kept under tight security and director Mani Ratnam is making sure that no one from the media or her fans views the look donned by the diva for his flick Ravana where Ash is playing the character of Sita.Mani always make sure not to release any pictures of his movies before the release. The shooting been held in the forest area is helping the directors cause as no cars could reach the site and they need to travel in jeeps.Arriving in cars, the stars get in