1. past tense of costar; to appear as one of the main actors alongside another star in a movie, play, or television show

Examples

• She costarred with Tom Hanks in the romantic comedy.
• The two actors costarred in three films together during the 1990s.
• He costarred in the Broadway musical before moving to Hollywood.
• The famous actress costarred with her real-life husband in the drama.
• They costarred in the hit television series for five seasons.
• The veteran actor costarred with several newcomers in his final film.