I suppose people who are no longer alive could also be used.
...back to 2007 when a mother uploaded a video on YouTube of her children dancing to Prince’s song Let’s Go Crazy. Although the video was only 29 seconds long and barely audible, Prince demanded that his music be taken off YouTube, saying that he intended to “reclaim his art on the internet.”
A series of clips depicting one of the most recognised faces in the world, created by one guy at home with a computer, had fooled virtually every piece of publicly available deepfake-detection technology.