History: Modeling Agency, 1948, United States

The agencies find work for models by presenting them to designers, photographers, and ad agencies. The agencies are also responsible for booking the jobs, billing for the jobs, and eventually paying the models for their time. By handling the details, an agency allows a model to focus on modeling and not on the business end.
Because modeling is a very competitive, fast moving business that extends beyond the traditional 9 AM to 5 PM business hours, an agency generally conducts business 24 hours a day, to handle emergencies such as cancellations or rush jobs. Most agencies have a service or an operator to handle emergency issues after hours.