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co·​star ˈkō-ˌstär How to pronounce costar (audio)
variants or co-star
plural costars or co-stars
: one of two or more main performers who star in a motion picture, 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


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variants or co-star
costarred or co-starred; costarring or co-starring
transitive : to employ or present (someone) as one of two or more leading performers in a motion picture, play, etc.
Directed by Lasse Hallström … and costarring a fine ensemble …Leonora Langley
intransitive : to appear with another star in a motion picture, play, etc.

Examples of costar in a Sentence

Recent Examples on the Web
On Wednesday, May 15, John Krasinski, who played Jim Halpert on the sitcom, stopped by the Office Ladies — a rewatch podcast hosted by his former costars Jenna Fischer and Angela Kinsey. Angel Saunders, Peoplemag, 17 May 2024 Polls rating the outfits of Fineman’s Megalopolis costars Nathalie Emmanuel and Aubrey Plaza also skewed more negative than positive. Wesley Stenzel,, 17 May 2024 See all Example Sentences for costar 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'costar.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use


1888, in the meaning defined above


1896, in the meaning defined at sense 2

Time Traveler
The first known use of costar was in 1888

Dictionary Entries Near costar

Cite this Entry

“Costar.” Dictionary, Merriam-Webster, Accessed 22 May. 2024.

More from Merriam-Webster on costar

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