Governor Gavin Newsom signed Senate Bill 1050 on September 16, making California advertisers disclose when an AI-generated performer features prominently in an ad. The law, written by Senator Angelique Ashby and sponsored by SAG-AFTRA, adds a section on "synthetic performers" to the state's false advertising rules, and it explicitly covers an off-camera narrator, which is why voice actors are paying close attention.
A synthetic performer is defined as a digital figure, voice or likeness made wholly or partly with generative AI that gives the realistic impression of a human performance but is not an identifiable real person. Disclosure is required when such a performer voices the narration or the sales message, demonstrates the product in the foreground, or reacts to the narration. The label must be hard to miss and say something close to "no human performer is depicted". A breach counts as false advertising, and once a court order is served, broadcasters, streamers and ad networks must stop running the ad.
Newsom signed the bill at SAG-AFTRA's headquarters, saying people deserve to know when whoever is selling to them is not a person. Ashby presented it as protection for jobs as well as consumers, and SAG-AFTRA's Duncan Crabtree-Ireland said the union helped draft its language. Four major advertising trade groups had written to the governor asking for a veto, arguing that the labels apply even when nobody is misled and invite opportunistic lawsuits, and law professor Eric Goldman suggested the takedown duty could collide with Section 230.
The report stresses the phrase "in whole or in part": a read that has only been partly generated still counts. There are notable exceptions. Ads for films, series and games that use a synthetic character in the same way as the work itself are excluded, as are ads where AI only translates a human performer's read into another language or adds accessibility features. A clone of a recognisable real person falls under other laws instead. The report points out that the translation carve-out means an AI-dubbed version of a human voice-over needs no label, leaving the question of whether such a version may be made at all to performers' contracts. The report also mentions that New York already has comparable ad disclosure rules.
With no urgency clause, the law should take effect on January 1, 2027. A companion bill from Ashby, SB 1111, which would bring digital replicas into the state's impersonation law, had passed the Assembly 77 to 1 and was awaiting the governor's decision, due by September 30. The law does not ban AI voices or pay anyone; its effect is to make brands that choose a synthetic narrator tell listeners so. The outlet expects some advertisers to decide that ending a warm, local-sounding spot on that label is not worth it, though nobody yet knows how many, and sees the measure as putting into law voice actors' long-standing claim that listeners care whether a real person is speaking.
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