For films in production, the strike means a large portion of work will become impossible. Even in cases in which filming has already been completed, actors will be unavailable for re-shoots and other essential elements of the filmmaking process.
TV shows that are still being filmed will also largely have to stop, although in some cases side deals could be struck between performers and producers to allow work to continue.
Top Hollywood stars will not be able to attend events to promote new and upcoming releases. Events including the Emmys and Comic-Con may be rescheduled or scaled back.