At least three theories are doing rounds about Sneha's exit from Superstar Rajinikanth's 'Kochadaiyaan'. The smiling beauty, as per the recent announcement from director Soundarya R Ashwin, has been replaced by Rukmini of 'Bommalattam' fame.

While a set of sources say the dates given by Sneha were wasted since the project is taking time to kick off, others say Soundarya wanted a professional dancer for the role and hence she found Rukmini as the right choice.

Meanwhile, there are also others who say Sneha was not happy to play Rajini's sister. "She would have been more than happy if she was picked as one of the heroines. Remember there are three leading ladies in the film," they point out.

With Jackie Shroff, Sarath Kumar, Shobhana, Nassar and Aadhi in key roles, 'Kochadaiyaan', a historic film, has music by AR Rahman. Buzz is that the Oscar-Grammy winner already completed composing three songs.