Casting calls are jobs description generate by a director or a casting director based on their character's breakdown. Until not so long ago all casting process was done by mailing and messenger services. The envelopes contained a cover letter, headshots, and resume of the actor sent by his / her representative Once the casting director viewed the packet he / she would call the actor's representative to schedule an audition. Usually following a successful audition will come a callback
If the actor delivered a good convincing performance in his callback(s) he / she would most likely get the part or would be on avail
Today, more and more casting calls are posted online, therefore the all casting process is done online. Many sites take money for this service.
CASTING CALLS ARE ALWAYS FREE AT Actors Pages