After the 'Ra.One' track 'Chammak Challo' leaked on the net a month back, Shahrukh Khan is being extra cautious and is extremely guarded towards his ambitious film.

Till the official promo released, Shahrukh was successful in keeping everything under wraps and now that he has revealed the first promo and his look, he is guarding his villain, Arjun Rampal's avatar in the film. Arjun Rampal, who plays the title role 'Ra.One', has a special look in the film and SRK doesn't want it out be out before the desired time. Shah Rukh is heavily banking on Arjun's character and wants to maintain the curiosity amongst the viewers.

The film which is currently on the editing table has very few people involved in the edit-process. He has made his crew sign an agreement that bars them from bringing mobiles, so that nothing leaks out. He has also barred them from talking about Arjun's role in public.

Shahrukh will release the final promo featuring Arjun just two weeks before the film's release. Arjun, as 'Ra.One', will be seen in a leaner look, as his avatar in the film is said to be different from all his previous looks.