Tom Hanks has warned fans that an ad for a dental plan that appears to use his image is in fact fake and was created using artificial intelligence.

In a message posted to his 9.5 million Instagram followers, the actor said his image was used without his permission. “BEWARE!! There’s a video out there promoting some dental plan with an AI version of me. I have nothing to do with it,” Hanks wrote over a screenshot of a computer-generated image of himself from the clip.

The Oscar winner has expressed concerns in the past about the use of AI in film and TV, although he has not shied away from approving digitally altered versions of himself in film.