Taapsee Pannu ,  Samantha Ruth Prabhu ,  Sonakshi Sinha  and  Anushka Sharma ,  with  Kajal Aggarwal  eventually grabbing the role.  National Award winning Kannada actress  Tara  who played Karthik's sister in  Agni Natchathiram  was signed on to play Suriya's mother.   Prakash Raj  was dropped out of the film and he