THE IRISHMAN(2019) uses deep fake for de-aging the actors. As the main actors are all old in real life, the CGI team generated deep fake videos of the actors by using the data from their old movies when they were younger.
You can check out that impressive process here - https://youtu.be/JL2Lk8XqwTg?t=193 , it's a testament for the ethical usage of the deep fake as stated in this need gap.