Barbarella is a classic sci-fi movie from 1968 where you can see a highly sexual woman (Jane Fonda) trying to find and stop the evil. And here you can see some interesting posters from that epoch. They were basically illustrations or photography with illustrations like most of them until the '90s.
Unfortunately, we don't have many illustrated movie posters nowadays. I love them.
One more thing, if you are too young and have no idea about the movie, you should see the original trailer below.