Disney and Universal are the first major Hollywood studios to file copyright infringement lawsuits against AI companies, marking a pivotal moment in the ongoing fight by artists, newspapers and content makers to stop AI firms from using their work as training data.

Disney and Universal just sued Midjourney for scraping their IP—ushering in a major showdown over how AI is trained.

Disney and NBCU filed a federal lawsuit Tuesday against Midjourney, a generative AI start-up, alleging copyright infringement. The companies alleged that Midjourney’s own website “displays hundreds, if not thousands, of images generated by its Image Service at the request of its subscribers that infringe Plaintiffs’ Copyrighted Works.”