Acting is an intensely competitive field, and it may be difficult to achieve recognition or get steady work as an actress or actor. Few who try to make it in this field become big movie stars; instead, you might work as an extra, a role that generally requires listing by a casting agency and often has no lines to deliver. You might also do voiceover work for animated movies or advertisements. To supplement income from acting roles, you might teach acting classes for a public program or school drama department. The pressure to find work and perform well can make acting a high-stress job that requires patience and perseverance.