The cast of the upcoming film 'Oppenheimer' walked out of the screening of their film as SAG-AFTRA prepared to go on strike. The guild announced a strike. Director Christopher Nolan told the crowd at the film's London premiere that the cast of his film had left and are off to 'write their picket signs', reported Deadline. 

From the stage, Nolan said, "I have to to acknowledge the work of our incredible cast, led by Cillian Murphy,” Nolan said from the stage. “The list is enormous — Robert Downey Jr, Matt Damon, Emily Blunt, Florence Pugh, Kenneth Branagh, Rami Malek and so many more. … You’ve seen them here earlier on the red carpet. Unfortunately, they are off to write their picket signs for what we believe to be an imminent strike by SAG, joining one of my guilds, the Writers Guild, in the struggle for fair wages for working members of their union.”