In the moving picture studios, on the other hand, the players are paid by the week, to work, as it were, by the day. The photoplay actor plays as many different parts as the director finds it necessary to cast him for. If necessary, in a big production, a director can draw on any or all of the players making up the stock company, provided he does not prevent them from playing the parts in another picture then in course of production, for which they have been previously cast. So that, so far as salary is concerned, unless certain "types," either men or women, are specially engaged for a production, the film manufacturer does not need to worry about how many "principals" are needed to take part in a picture. He has, of course, to consider the salaries of the "extra people," or supernumeraries, when a picture calls for their employment. But the principal reason for keeping the photoplay cast as small as possible is that the fewer the principal characters the more easily understood is the story. In this respect, better twenty extras and five principals than twenty principals and two extras.
Remember, then, to use as few principal characters as possible in developing your plot. This does not mean that you may be prodigal in your use of extras; quite the contrary. But, since extras who are posing as cowboys, soldiers, guests at a ball, bystanders in a street scene, or saloon loungers, are easily distinguished from the principals, it is a matter of small importance how many are used so long as the scene is full enough to harmonize with the idea. It would be silly, of course, actually to specify the number of "travellers and bystanders" used in a scene at a railroad station at train time. The director will employ as many as he thinks necessary.
4. How the Director Assigns the Cast
It frequently happens that members of the regular stock company are used to fill in in certain scenes, although they may not be cast in the picture at all. When, for example, the scene is laid in a ballroom, or when boxes and orchestra chairs in a theatre are shown, the director uses as many of the regular company as are available—knowing that they may be relied upon to sustain the necessary action, and feeling sure that they will "dress" the scene suitably. Extras are then drawn upon for as many more people as he may require.
A distinction must be made between extras who merely fill in or dress a scene and those who play a small part, or "bit," in one or more scenes. In every studio there are men and women who are known as "regular" extras—people who are on hand every morning and who remain until they are either told that they can work in a certain picture or that they will not be required that day. Practically all of these regular extras are experienced actors and actresses, and most of them continue to report daily in the hope that, being given a small part to play, they may in this way attract the attention of the director and eventually be offered positions in the stock company. Many of the best known photoplayers in the country today made their start in moving-picture work in this way after having forsaken the "legitimate" stage.
5. Planning the Cast
Strictly speaking, it is no longer advisable, nor even possible, to plan your cast ahead, when writing photoplays, any more than it would be possible to state exactly in advance how many characters you would introduce if you were setting out to write a novel. Today more than ever before the demand is for good stories. Given a good story, a competent director will do the rest. He will not hesitate to engage for that production just as many people as may be necessary, whether they are special "type" players, male or female, or for "straight" parts. Your cast, in other words, must inevitably be a result of the final working out of your story. The one thing you can do in advance is determine whether you are going to write what is simply a good story or is a story designed as a vehicle to exploit some particular "star."
This latter procedure is always a risky one for the writer to adopt. The story planned and worked out to fit the talents of a certain star, especially if designed to feature the very unusual work of such a player as Douglas Fairbanks, may not sell at all if it fails to sell to the one for whom it was planned, and the writer's work goes for naught. By far the wisest plan is to write for certain particular stars only under contract, or at least to write only stories that stand a chance of selling elsewhere if rejected by the firm at which they were first aimed.
If you are writing "to order" for a certain star, and if you are reasonably sure that the supporting players are permanent members of that particular company, you may plan your story so as to give the director a chance to use all the people at his disposal to the best advantage, for today, while character-actors are just as busy as ever, it is the actual "type" that is usually cast for a certain part if such a man or woman is procurable at all.
As for whether a certain "small" part is played by an "extra" or by a regular member of the stock company, you need not worry. The director will do his best for every part, however small.