In the entertainment industry, the term "costar" is often used to refer to an actor who shares screen time with the lead actor or actress. However, there are several other terms that can be used interchangeably with "costar." These include co-performer, co-star, fellow actor, scene partner, ensemble member, supporting actor, and leading actor. Each of these synonyms describes an actor who plays a vital role in a production but may not necessarily be the lead. Using different synonyms for "costar" can add variety and depth to a written description and can help to convey the importance of each character in a performance.