1. present participle of costar; appearing as one of the main actors alongside another main actor in a movie, play, or television show

Examples

• The romantic comedy is costarring two popular actors from different genres.
• She is costarring with her real-life husband in the new Broadway production.
• The action movie is costarring an established veteran and a rising newcomer.
• They announced the sequel would be costarring the original cast members.
• The director is costarring the two leads who have great on-screen chemistry.
• The drama series is costarring actors from three different countries.