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

Derek recently interviewed Bell, 45, and costar Adam Brody ahead of the season 2 premiere of Netflix's Nobody Wants This. —Madison E. Goldberg, PEOPLE, 29 Oct. 2025

When Brittany Snow thinks of filming intimate scenes with costar Malin Akerman onThe Hunting Wives, one thing in particular stands out to her. —Raechal Shewfelt, Entertainment Weekly, 29 Oct. 2025

Verb

Williams costars with Mckenna Grace, Dave Franco and Mason Thames in Regretting You, an adaptation of author Colleen Hoover's 2019 novel of the same name. —Tommy McArdle, PEOPLE, 29 Oct. 2025

Modern Family costars Julie Bowen and Ty Burrell snapped a selfie together while watching the college football match. —Daysia Tolentino, Entertainment Weekly, 27 Oct. 2025

Word History

First Known Use

Noun

1888, in the meaning defined above

Verb

1896, in the meaning defined at sense 2