Supporting actors are performers who play secondary roles in a film, television show, or theater production. Their characters often help to advance the plot or develop the main characters, providing depth and context to the story. While they may not receive top billing, their contributions are essential for creating a well-rounded narrative. These actors can vary widely in experience and recognition, ranging from seasoned professionals to newcomers. Notable supporting actors, such as J.K. Simmons and Octavia Spencer, have received critical acclaim and awards for their performances, showcasing the importance of their roles in the entertainment industry.