From a New York Times story by Matt Stevens headlined “What to Know About the Actors’ Strike”:

The union representing more than 150,000 television and movie actors announced Thursday that it would go on strike at midnight, joining screenwriters who walked out in May and creating Hollywood’s first industrywide shutdown in 63 years.

Why are the actors and writers striking?

Pay is often at the center of work stoppages, and that is the case here. But the rise of streaming and the challenges created by the pandemic have stressed the studios, many of which are facing financial challenges, as well as actors and writers, who are seeking better pay and new protections in a rapidly changing workplace.