I'll start.
Did you know that Wil "Wesley Crusher" Wheaton's first credited acting role was Martin on the Secret of NIMH animated film? That was probably the last time he sounded assertive and tough in an acting role too, and he was both a little kid and a mouse. :rat-salute:
Oh here’s a neat one. When Andy Sorenson was doing test shoots for To End The World, the plan was to do the big climax scene as a one-shot, as a callback to the intro. But it didn’t work and by the time they decided to scrap it, they were well into post and he was on another project. So the CGI-heavy scene that he’s famous for was actually part of reshoots. He didn’t find out until the premiere