costar

1 of 2

noun

co·​star ˈkō-ˌstär 

variants or co-star

plural costars or co-stars

: one of two or more main performers who star in a movie, play, etc.

… the star seems more relaxed and confident, and there's a bracing snap to the byplay between him and his costars.

—Mark Harris

costar

2 of 2

verb

variants or co-star

costarred or co-starred; costarring or co-starring

1

transitive : to employ or present (someone) as one of two or more leading performers in a movie, play, etc.

Directed by Lasse Hallström … and costarring a fine ensemble …

—Leonora Langley

2

intransitive : to appear with another star in a movie, play, etc.

Examples of costar in a Sentence

Recent Examples on the Web

Noun

Radke hadn’t planned to screen his own reality show at his business, but the idea quickly caught on — especially as the romance between costars Amanda Batula and West Wilson began making headlines. — Dave Quinn, PEOPLE, 8 Sep. 2026

To mark the release of Practical Magic 2, Kidman and her costar Sandra Bullock have been answering questions about the magical cocktail left and right. — Shania Russell, Entertainment Weekly, 6 Sep. 2026

Verb

Gerber’s The Shards costars Homer Gere and Hayes Warner pressed the model for more information about the doll as part of the game, which requires actors to discern whether their costars are sharing true or false stories. — Emlyn Travis, Entertainment Weekly, 3 Sep. 2026

Directed by Babak Najafi and written Scott Windhauser, Eran Creevy and Ethan Suess, The Florist costars Jean Reno, Anna Schafer, Leonidas Gulaptis and Dylan Flashner. — Jack Smart, PEOPLE, 1 Sep. 2026

Word History

First Known Use

Noun

1888, in the meaning defined above

Verb

1896, in the meaning defined at sense 2