After the attachment phase is complete (which depends on many factors—including but not limited to: financial backers, studio heads, availability of other above the line personnel), the physical auditions begin for all of the remaining roles. During this time, depending on the budget of the film, they could have what is called "pre-screens" where you audition only for a casting director (or associate) to see if the actor is right for the material. After pre-screens would be a "director session", during this time the actor comes in and auditions (usually with the same material) and now performs for the casting director and the film director. If there is a next step, it is usually a "callback" or producer session, where anyone who has decision making power is in the room for your audition. In television, this phase is referred to as a "screen test" and Network Executives would also be in attendance. Once actors are selected from the pool of available actors, the same booking process that happens in the attachment phase takes place for any actor except extras.