Acting boils down to a pretty simple dichotomy: say your lines while you're filming, and then don't say those lines anymore
. But some actors just can't get the hang of it.
You've got your Toms Holland and your Marks Ruffalo, who are so notorious for dropping spoilers that their costars take shifts trying to keep them quiet. But then there's Will Smith, a seasoned promoter who just occasionally gets so jazzed up
about a movie that he can't help himself.
Here are a few times actors spoiled their own projects: