If you think acting isn’t dangerous, think again. Not only do actors sometimes put their bodies in harms’ way on set, but they also put their emotional and mental health at risk, exposing themselves to long, difficult hours, harsh tabloid coverage, and lives that can be rather isolating. Tragic as it is, some actors have died before the films they are working on are complete. In many cases, these circumstances create even more buzz around a film or episode of a show, drawing fans of the deceased to watch in hoards so they can pay homage to a beloved actor in his or her final performance. One of the most famous cases is Heath Ledger, who died before filming was completed for “The Dark Knight.” These are 17 celebrities who died while making movies.