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

Goldie Hawn is fondly remembering her late costar Ruth Buzzi. —Ingrid Vasquez, People.com, 3 May 2025

For its debut, the Parks and Recreation actress shared two episodes with fans—one with Mean Girls costar Tina Fey and the other with Only Murders in the Building star Martin Short. —Mohammed Soliman, MSNBC Newsweek, 28 Apr. 2025

Verb

Another clip showed Lively posing with Feig, 62, plus costars Kendrick, Henry Golding, Andrew Rannells, Elizabeth Perkins, Bashir Salahuddin, Michele Morrone and Alex Newell. —Jen Juneau, People.com, 28 Apr. 2025

The actress costars in the action thriller alongside Omar Sy. —Julia Teti, Footwear News, 28 Apr. 2025

Word History

First Known Use

Noun

1888, in the meaning defined above

Verb

1896, in the meaning defined at sense 2