Over 1,000 Hollywood boldface names released an open letter Monday morning, expressing unequivocal opposition to Paramounts mega-deal to acquire Warner Bros. Discovery.

The letter, which was released by a consortium of groups including Norm Eisens Democracy Defenders Fund and Jane Fondas Committee for the First Amendment, counts a whos who of signers, including actors like Bryan Cranston, Glenn Close, Ben Stiller, Don Cheadle, Jason Bateman and Ted Danson, directors like JJ Abrams, Denis Villeneuve and Yorgos Lanthimos, producers like Ted Hope and Mark Duplass, and multi-hyphenates that include Lin-Manuel Miranda and David Chase.

You can see the full list of signatories here.

This transaction would further consolidate an already concentrated media landscape, reducing competition at a moment when our industriesand the audiences we servecan least afford it, the letter states. The result will be fewer opportunities for creators, fewer jobs across the production ecosystem, higher costs, and less choice for audiences in the United States and around the world. Alarmingly, this merger would reduce the number of major U.S. film studios to just four.

We are deeply concerned by indications of support for this merger that prioritize the interests of a small group of powerful stakeholders over the broader public good, the letter continues. The integrity, independence, and diversity of our industry would be grievously compromised.

The letter is notable not only for its star power, but for the fact that many of the people who signed it work or have worked for one or both of the studios seeking to merge. Abrams, for example, has an active deal with Warners through Bad Robot, and Villeneuve will release Dune 3 through Warners later this year. Chase has a new project in the works at HBO, while Bateman is starring in the HBO series DTF St. Louis.

The letter concludes by calling for California Attorney General Rob Bonta and other regulators to block the deal.

The full text of the letter is below.

As filmmakers, documentarians, and professionals across the movie and television industry, we write to express our unequivocal opposition to the proposed Paramount-Warner Bros. Discovery merger.

This transaction would further consolidate an already concentrated media landscape, reducing competition at a moment when our industriesand the audiences we servecan least afford it. The result will be fewer opportunities for creators, fewer jobs across the production ecosystem, higher costs, and less choice for audiences in the United States and around the world. Alarmingly, this merger would reduce the number of major U.S. film studios to just four.

Our industry is already under severe strain, in large part due to prior waves of consolidation. We have witnessed a steep decline in the number of films produced and released, alongside a narrowing of the kinds of stories that are financed and distributed. Increasingly, a small number of powerful entities determine what gets madeand on what termsleaving creators and independent businesses with fewer viable paths to sustain their work.

Media consolidation has accelerated the disappearance of the mid-budget film, the erosion of independent distribution, the collapse of the international sales market, the elimination of meaningful profit participation, and the weakening of screen credit integrity.

Together, these factors threaten the sustainability of the entire creative community. That includes endangering the professional lives of the tens of thousands of workers who help make up that community in predominantly small businesses and independent companies embedded in local economies and communities nationwide.

We are deeply concerned by indications of support for this merger that prioritize the interests of a small group of powerful stakeholders over the broader public good. The integrity, independence, and diversity of our industry would be grievously compromised.

Competition is essential for a healthy economy and a healthy democracy. So is thoughtful regulation and enforcement. Media consolidation has already weakened one of Americas most vital global industriesone that has long shaped culture and connected people around the world.

Fortunately, someone is doing something about all this. California Attorney General Rob Bonta and his colleagues in other states arereportedlyscrutinizing the merger and considering legal action to block it. We are grateful for their leadership, and stand ready to support all efforts to preserve competition, protect jobs, and ensure a vibrant future for our industry, for American culture, and for our single most significant export.

More to come.