No more Margot Robbie in pink skirts and a million-watt smile at Barbie premieres. No more Robert Downey Jr. posing for the camera with Oppenheimer co-stars Cillian Murphy, Emily Blunt, and Matt Damon on Instagram.Instead, as director Christopher Nolan put it, they’re all off to “write their picket signs” after the Screen Actors Guild announced a strike.

Actors, both renowned and not-so-famous, are barred from performing PR for any of their films, even if they are unreleased, while the strike is in effect, according to SAG rules. This encompasses live events such as premieres, festivals, and conventions, as well as virtual marketing via social media.

That’s the reason the Oppenheimer cast left the movie’s London premiere before the screening began, even though they were at the red carpet earlier.

The Screen Actors Guild represents 160,000 actors, who will join a separate writers’ strike. The unions and the Alliance of Motion Picture and Television Producers, which represents studios such as Netflix Inc. and Walt Disney Co., have not struck a new labour agreement. Fans looking for a surprise movie-star cameo during Barbenheimer – a double bill of Barbie and Oppenheimer – will most certainly be disappointed.

The Writers Guild of America has already been on strike since early May, threatening their future entertainment.

This move has caused delays and halts in several projects, as well as threatening the traditional delivery of new broadcast TV shows beginning in September.

Prior to leaving the London premiere on Thursday, Blunt had vowed to support her fellow actors. She told Deadline, “I hope everyone makes a fair deal and we are here to celebrate this movie. And if they call it, we’ll be leaving together as cast in unity with everyone … We are gonna have to. We are gonna have to.”

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