The phrase "first movie" refers to the earliest or initial film ever made by someone or a film in a series that is watched before the others. Full definition
It works and the circle logo is now unfortunately associated with the dire first movies so a simple redesign makes sense in that respect too. (firstshowing.net)
I started reading the books as a child, and then the very first movie came out. (wolfsgamingblog.com)
It's probably the very first movie I've seen with him. (metacritic.com)