Morbid question: What is the newest movie in which all the actors of named characters are all dead?

I was following a movie podcast and they noted how all the actors in their 100+ year old movie were dead. I get that dissonance sometimes when I watch old movies, too. It had me wondering what is the newest movie in which all the actors are all passed? What are some of the edge cases?

I have literally no idea how to research this!