 The International Alliance of Theatrical Stage Employees, or IATSE, represents 50,000 below-the-line workers in Hollywood, including cinematographers, costume designers, makeup artists, hairstylists, set decorators, lighting technicians, and other craftspeople. After months of negotiations with the Alliance of Motion Picture and Television Producers, the parties reached a tentative deal that would increase pay, pension and health benefits, streaming residuals, and protections from artificial intelligence.