The final countdown is on. Kamal Haasan's 'Viswaroopam' is expected to hit the floors very soon, with the Ulaga Nayagan finalizing almost everything related to the project, except the heroine.

"This is because of the sudden walkout of Sonakshi Sinha from the film, due to some unavoidable reasons. A search is on to replace her and things will be finalized within this week," sources in the know tell us.

"Kamal is keen to start the shoot at the earliest. He feels that the project is already being delayed," they further say, adding: "In all probability, he will begin Viswaroopam by the second week of August."

To be directed by Kamal Haaasan himself, 'Viswaroopam' is said to be an action thriller which will be shot in foreign locales. Initially Selvaraghavan was roped in as the director, but he had to opt out to complete 'Maalai Mayakkam' with Dhanush.