A casting director finds the actors for a film. They break down every role, draw on their knowledge of thousands of performers to build a list for each, run the audition process, present the strongest options to the director, and then negotiate the deals for whoever is chosen.
The distinction that matters: they do not cast the film. The director and producer make the final decisions. The casting director produces the range of choices they get to make, and the quality of that range determines the ceiling of the finished film.
Why casting is so consequential
Almost every other problem on a film can be worked on. A weak scene can be re-edited, a bad location can be lit differently, a costume can be changed. An actor who cannot deliver the part is a problem you carry for the entire shoot and forever afterward.
Good casting also removes work. A well-cast actor arrives already carrying much of what the director would otherwise be trying to produce through direction. Directors who talk about casting as ninety percent of directing are not being modest; they are describing a real allocation of effort.
The process
Character breakdowns. For each role, a description of who this person is: age range, essential qualities, what the part demands, how many scenes, and any specific requirements such as language, an instrument, a physical skill, or nudity.
Sourcing. Circulating breakdowns to agents, searching databases, drawing on the casting director's own memory of performances seen over years. That last resource is the substantive one and it is what a production is paying for. A good casting director has watched an enormous volume of theatre, television and film, and remembers people.
The longlist and shortlist. Narrowing from hundreds to a manageable set per role.
Auditions. Organizing and running them: booking, sending sides, setting up the room, reading opposite actors, recording the sessions, and presenting the tapes.
Callbacks. Second and third rounds with a smaller group, often with the director more actively involved.
Chemistry reads. Pairing shortlisted actors together to see how they work opposite each other. Two excellent actors do not automatically make a believable couple, siblings, or antagonists, and finding this out in a room is far cheaper than finding it out in week two.
Deals. Negotiating fees, dates, billing, credit, and terms with agents. This is a substantial and unglamorous part of the job and it merges into production.
Availability juggling. Checking actors against the schedule, which is a genuine constraint problem and connects directly to scheduling around actor availability.
Actors audition from "sides": a few pages from the script, sent in advance, sometimes only hours in advance. They are asked to perform a scene out of context, in a room with no set, opposite a reader who is usually not an actor, for people looking at a screen. It is an artificial and difficult format, and part of a casting director's craft is running a room in a way that lets people be good in it. The best ones are generous with actors, give useful redirects, and know that a nervous first take is not information. A casting session run badly produces a worse film, because good performers get eliminated by the process rather than by their suitability.
Beyond the leads
Supporting roles. Frequently more work than the leads, because there are more of them and less time is spent on each. A film's texture lives here.
Day players. Small speaking parts, often cast late and quickly.
Background casting. Often handled by a separate extras casting agency, briefed by the casting director or the AD department.
Voice casting, for narration, ADR and animation.
Working with the director
The relationship is consultative. The director describes the character, the casting director interprets it, and the interpretation is where the value lies.
Frequently the best casting director contribution is a suggestion the director had not considered: someone against type, someone from a different medium, someone twenty years older than the script says. Directors talk about a casting director who "opened the part up", and that is what they mean.
The other useful function is honest counsel. A casting director will tell a director when an actor they love is wrong for a role, when a name attachment is not worth the compromise, and when a chemistry read went badly regardless of how good the tapes were.
The business side
Casting sits close to the money, which is why casting directors are often involved earlier than most crew.
Attachment and financing. Certain actors make a film financeable, and casting directors advise on who is realistically available at what level. Producers make hard trade-offs here between the right actor and the fundable one, and it is one of the more honest conversations in the industry.
Agent relationships. Most access to actors runs through agents, and these relationships take years to build. It is a large part of what the role provides.
What makes a good one
Memory for performances. The core asset.
Taste. Seeing what an actor could do rather than what they have done.
Room craft. Making actors comfortable enough to be good.
Negotiation. Deals get done here.
Honesty with directors, including when it is unwelcome.
On a small film
You will probably cast your own short. It is worth doing properly, because it is the decision that most affects the result.
Do not cast friends by default. The most common reason a short film does not work. If a friend is genuinely right, cast them, but audition them.
Post real breakdowns. Actor casting platforms exist in most countries, many are free or cheap to post on, and a huge number of good actors are looking for interesting work, particularly early in their careers. Be specific about the role, the dates, whether it is paid, and what it involves.
Send sides in advance. Twenty-four hours minimum. Auditioning someone on material they have just been handed tells you about their cold reading, not their acting.
Have someone competent read opposite. Ideally an actor. A reader who gives nothing back makes everyone look worse.
Record everything, with permission. You will not remember accurately, and you will want to compare.
Give a redirect. Let them do it once their way, then ask for something specific and different. How an actor takes direction is more predictive of the shoot than their first take.
Do a chemistry read for any two-hander. This is the single highest-value thing on this list.
Be clear about the deal. Dates, payment, expenses, food, travel, and what the film will be used for, in writing, before anyone commits. See deal memos and rates.
Reply to everyone who auditioned. It costs nothing and it is the reason people will work with you again.
Next
Back into the production office, and the person who holds the entire administrative machine together.
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