Prithviraj’s much awaited movie Karnan will begin shooting by December this year. Director RS Vimal says, “We are planning to scale it up as an international film and that's what is taking the time. I can confirm that the movie will begin shooting by the end of this year." Earlier, the movie was set to kick off by mid August. Meanwhile, Prithviraj has currently finished shooting for Jinu Abraham’s Adam Joan and is in the final stages of shooting for Pradeep Nair’s Vimaanam. He is then expected to start shooting for Blessy’s Aadujeevitham by November.