I have a question for actors or anyone with true knowledge in that business about casting.?

I am in Brazil, and here it is usual for people to need a certficated, to have a Registration number as actors to be able to audition for roles with lines on TV, and in movies it is often requested. Is it the same way in the United States and European countries or are most auditions open calls?I have a question for actors or anyone with true knowledge in that business about casting.?
I'm sure it's different here.





The majority of the casting is done by a producer hiring a casting agent who contacts a top talent agency, sets up a reading or audition based on a short list of actors supplied by the talent agency. Those actors usually have film/tv credits already, or they wouldn't have been represented by a top agency. And anytime you get a speaking role, you must join a performers union. For film, it's usually SAG; for tv, it's usually SAG or AFTRA.





Some smaller productions and smaller roles are cast through requests sent to a larger number of talent agencies.





And really low-budget or really hard-to-cast roles may actually be an open call.I have a question for actors or anyone with true knowledge in that business about casting.?
It varies, but theater stuff is mostly open cattle call.


TV and some commericals are agents and specials.
Some auditions in the U.S. are open only to actors who are members of certain professional unions. Some are open only to actors who are represented by agents. Some are open to everybody.