When someone is pursuing a career in acting, having an agent is key. Agents can open doors for actors and build careers with their contacts in the entertainment industry and knowledge of the business. Acting agents get their clients auditions and negotiate deals once actors book jobs. Most of the time, big-name studios will submit breakdowns to talent agents, allowing them to submit their clients for potential auditions. Without an agent, many actors never have a chance to submit to the breakdowns and book jobs on big-budget films and famed TV shows.
eHow Article: What Does an Acting Agent Do?