Watch full movie online. Rockstar is a 2015 Malayalam romantic comedy film directed by V. K. Prakash and produced by P. K. Ratheesh.Sidharth Menon makes his debut as the lead, titular role, who also co-produced the film under Build Block Productions. Lokanathan does the cinematography and Prashant Pillai scores the music. The story and script are written by Rajasree Balram.