Thalaivi, the biopic of former TN CM and AIADMK supremo J Jayalalithaa, is progressing at a brisk pace and will come live on the big screen in June. National Award winner Kangana Ranaut plays the Iron Lady of TN politics. Kangana will play different stages of JJ's life from her young days as an actress to the firebrand politician she was in her later stages of life. Kangana had been undergoing rigorous makeover to get into the looks of JJ. She had also taken lessons in Tamil and in Bharatanatyam for the role. Now, she has already beefed up and gained 20 kilos for the plump look. Another challenge is that Kangana has to shed those extra 20 kilos for her upcoming films, Tejas and Dhaakad.