Some movies are hard to watch. Not because they have crappy storylines or shoddy special effects, but because when certain actors show up — particularly actors who died while filming that movie — you can't help but get emotional (see: Furious 7 with Paul Walker, The Dark Knight and The Imaginarium of Doctor Parnassus with Heath Ledger, and The Matrix Reloaded with Aaliyah).
It's an unfortunate reality that some films will always be associated with the death of a star.
Ahead, we've listed 16 actors who died during the filming of a movie and how producers had to deal with the loss in terms of the film. At times, the part was recast or a stand-in was used, and in some cases, production ceased altogether. In the end, though, these actors will always be remembered for their incredible talent.
A version of this article was originally published in April 2015.