Chennai -- If reports are to be believed then noted filmmaker Shankar has finalized the cast of his next film. According to reports, Chiyaan Vikram and Ghajini girl Asin have been approached for the lead roles in Shankars next directorial venture. In the yet untitled movie, maestro AR Rahman is expected to score the music, while Suresh and Bala will write the dialogues. However, the film will go on the floors only after Vikrams current film Thaandavam, which is being directed by AL Vijay, completes. The stars have also worked together before in 2005 flick Majaa.