Aishwarya Rai in Robot photo session

Rajinikanth and director Shankar have been very busy over the past few weeks with the groundwork for Robot set rolling. The duo have completed about three photo sessions thus far – one in Mumbai and two in Chennai. It seems that Shankar is quite satisfied with the outcome but the final decision on Rajini's get-up in Robot is yet to be decided. Meanwhile,

Rajini and Shankar will fly down to Mumbai in a few days time for the fourth photo session. Interestingly, this photo shoot session will have Aishwarya Rai also participating in it. Sources say that Shankar is taking extra care about Rajini's looks in Robot as his role happens to be that of a young scientist.