Celebrities Who Were Discovered Out of the Blue
If you want to make it in Hollywood, you're going to have to work hard for a long, long time.
Be prepared for a lot of competition, too. Hundreds of other actors are going to be gunning for the same roles as you, even if it's only a for bit parts in films nobody will see.
And you'll spend years trying to break into the business while honing your craft (and getting paid very little to do so). Then, after building up a modest resume, you might just get tapped to audition for a role in a major motion picture.
Or, you could simply skip all that stuff and get discovered out of the blue, kind of like the following folks: