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

Kanaly previously appeared in The Life and Times of Judge Roy Bean with future Dallas costar Victoria Principal, as well as Steven Spielberg’s The Sugarland Express (1974) and John Milius’ Dillinger (1973) as Pretty Boy Floyd. — Britt Hayes, Entertainment Weekly, 28 June 2026

He was joined by his costars Mary Beth Barone, Wally Baram and Owen Thiele. — Dessi Gomez, Deadline, 27 June 2026

Verb

The carousel of photos also included a more recent selfie of Aniston and the 11-time Emmy winner reuniting behind the scenes, and a sweet shot of Aniston making a funny face as her Friends costar David Schwimmer posed alongside Burrows at an event. — Kimberlee Speakman, PEOPLE, 20 June 2026

Scandal costars Kerry Washington and Tony Goldwyn reunited for Variety's Actors on Actors series. — Tiffany Kelly, Entertainment Weekly, 7 June 2026

Word History

First Known Use

Noun

1888, in the meaning defined above

Verb

1896, in the meaning defined at sense 2