co·​star | \ ˈkō-ˌstär How to pronounce costar (audio) \
variants: or co-star
plural costars or co-stars

Definition of costar

 (Entry 1 of 2)

: 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


variants: or co-star
costarred or co-starred; costarring or co-starring

Definition of costar (Entry 2 of 2)

1 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
2 intransitive : to appear with another star in a motion picture, play, etc.

Examples of costar in a Sentence

Recent Examples on the Web: Noun On Monday, Simon Guobadia announced his engagement to ex Falynn's Real Housewives of Atlanta costar, Porsha Williams. Anya Leon,, 11 May 2021 Cher is celebrating the life of her Moonstruck costar Olympia Dukakis who died on Saturday at the age of 89. Rosy Cordero,, 2 May 2021 Either way, the absence of her costar will be greatly felt by fans. Emily Tannenbaum, Glamour, 2 Apr. 2021 After the episode aired, Ellen Pompeo dedicated a heartfelt post to her costar. Amanda Garrity, Good Housekeeping, 15 Mar. 2021 Prior to marrying Anstead, Haack was married to her Flip or Flop costar Tarek El Moussa. Kelly Corbett, House Beautiful, 17 Feb. 2021 In your last clue package, there was a really touching tribute to your late Fast & Furious costar, Paul Walker. Lauren Huff,, 6 May 2021 Kaluuya was in the unusual position of competing against his costar in the movie, LaKeith Stanfield, also nominated for supporting actor. Mark Olsen, Los Angeles Times, 25 Apr. 2021 His costar Yuh-Jung Youn is the first Korean actress nominated in the best supporting actress category. Lisa Respers France, CNN, 19 Apr. 2021 Recent Examples on the Web: Verb Zack Gottsagen of Peanut Butter Falcon fame will costar as the actress' son, a baseball obsessive who has Down syndrome. Zoe Guy, Marie Claire, 17 Mar. 2021 This news also means there's now a mini-trend of Once Upon a Time in Hollywood actresses collaborating with their parents on screen, as Andie MacDowell is set to costar with her daughter Margaret Qualley in the upcoming Netflix series Maid. Tyler Aquilina,, 30 Oct. 2020 Lawrence will costar with Leonardo DiCaprio, Cate Blanchett, Timothée Chalamet, Ariana Grande, Matthew Perry, Kid Cudi, Jonah Hill, Himesh Patel, Tomer Sisley, and Rob Morgan in the flick. Amy Mackelden, Harper's BAZAAR, 18 Oct. 2020 Jeffery Wright, Peter Saarsgard, Paul Dano, and Andy Serkis will also costar in the new adaptation of the DC comic. Glamour, 16 Oct. 2020 Embarrassing Me, will costar Foxx's fellow In Living Color alum David Alan Grier and teenage actress Kyla-Drew. Tyler Aquilina,, 1 Sep. 2020 In 2012, Howard was nominated for an NAACP Image Award for outstanding supporting actress for The Help, a trophy that ultimately went to costar Octavia Spencer. Benjamin Vanhoose,, 8 June 2020 Here's the clip, which costars Darrell Hammond: Fallon's SNL sketch has been periodically resurfaced and criticized, but this might have been the first time the talk show host has addressed it. James Hibberd,, 26 May 2020 Rose Byrne costars as the animals’ human friend, Bea, a character modeled on Potter. Los Angeles Times, 16 Apr. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'costar.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of costar


1888, in the meaning defined above


1896, in the meaning defined at sense 2

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Last Updated

9 Jun 2021

Cite this Entry

“Costar.” Dictionary, Merriam-Webster, Accessed 18 Jun. 2021.

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English Language Learners Definition of costar

: one of two or more main actors in a movie, television show, or play

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