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

Vanessa Bayer, Julia Butters, Manny Jacinto, Maitreyi Ramakrishnan and Sophia Hammons, meanwhile, have joined in new roles, and Lohan's The Parent Trap costar Elaine Hendrix also makes a cameo. —Nicholas Rice, People.com, 19 May 2025

The two costars headed to the Club Albane rooftop, which offered an expansive view over all the yachts parked in the Mediterranean, after receiving a six-minute standing ovation for their work in Lynne Ramsay’s latest film. —Rhonda Richford, Footwear News, 18 May 2025

Verb

The Pretty Woman alum will costar with Ayo Edebiri, Andrew Garfield, Chlöe Sevigny, and more in the thriller film. —Madison E. Goldberg, People.com, 17 May 2025

Tina Fey is among the producers of that series, which costars Daniel Radcliffe. —Gary Levin, USA Today, 13 May 2025

Word History

First Known Use

Noun

1888, in the meaning defined above

Verb

1896, in the meaning defined at sense 2