Watch the trailer of upcoming drama film `Lion`Cast: Rooney Mara, Nicole Kidman, Dev Patel, David Wenham, Tannishtha Chatterjee, Nawazuddin Siddiqui, Pallavi Sharda, Eamon Farren, Benjamin Rigby, Arka Das, Menik Gooneratne, Priyanka Bose, Deepti Naval, Sachin Joab, Anna Samson