co·star | \ˈkō-ˌstär \
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

Though the former Glee actress didn't name her late costar, the poignant message appears to be a tribute to someone she's lost. Taylor Weatherby, Billboard, "Lea Michele Shares Poignant Quote on Anniversary of Cory Monteith's Death," 13 July 2018 Getty Images Kit Harington and Rose Lelsie tied the knot this weekend in Scotland in a beautiful ceremony attended by family, friends, and, of course, some of their Game of Thrones costars. Kayleigh Roberts, Marie Claire, "Sophie Turner and Maisie Williams Were Dates for Kit Harington and Rose Leslie's Wedding," 23 June 2018 Broderick’s top-drawer costars are Jessica Hecht and Brooks Ashmanskas., "The Ticket: What’s happening in the local arts world," 22 June 2018 Gough’s costars were also in awe at the overwhelmingly positive response from audiences. Vogue, "Angels in America Returns to Broadway With a Star-Studded Opening Night," 26 Mar. 2018 While Sophie, Maisie, and surely some other GoT costars will be at the celebration of the nuptials. Gabe Bergado, Teen Vogue, "Maisie Williams Will Be a Bridesmaid at Sophie Turner’s Wedding to Joe Jonas," 23 Jan. 2018 According to The Hollywood Reporter, Williams made $625,000 for her pre-reshoot work while Wahlberg made $5 million, or roughly eight times what his female costar did. Eliza Thompson, Cosmopolitan, "Michelle Williams's Original All the Money in the World Salary Was Also Less Than Mark Wahlberg's," 19 Jan. 2018 In an interview with The New York Times, the cast was asked about the allegations against Tambor, prompting costar Jason Bateman to defend his on-screen father. Tyler Mccarthy, Fox News, "'Arrested Development' cast talked Jeffrey Tambor, revealed on-set fight with Jessica Walters," 23 May 2018 According to The New York Post, Mack’s Smallville costar, Kristin Kreuk, introduced Mack to NXIVM in 2006. Amanda Arnold, The Cut, "Everything You Need to Know About Actress Allison Mack’s Alleged Role in Sex Cult," 22 Apr. 2018

Recent Examples on the Web: Verb

Josh Malina is notorious for pranking his Scandal costars — but the tables have turned. Aurelie Corinthios,, "Jimmy Kimmel Pranks Scandal's Josh Malina Ahead of Series Finale — See the Epic Moment," 19 Apr. 2018 Specifically, her salary will now be the same as costars Anthony Hopkins and Ed Harris, who play Dr. Ford and The Man in Black, respectively. Melissa Minton, Glamour, "Evan Rachel Wood Says She'll Receive Equal Pay for 'Westworld' Season 3," 17 Apr. 2018 While Abigail Spencer has worked with plenty of talented people, good friend and former Suits costar Meghan Markle has always stood out. Christina Dugan,, "Timeless Star Abigail Spencer on Her 'Lovely Friend' Meghan Markle," 7 Mar. 2018 Robin Wright, the current (and only) star of Netflix's House of Cards, has finally addressed her relationship to costar Kevin Spacey. Rebecca Farley,, "Robin Wright Addresses Co-Star Kevin Spacey: "I Didn't Know Him"," 9 July 2018 That’s not normal!' Yvonne Orji costars on Insecure, which returns to HBO this month. Jessica De Ruiter, Glamour, "Yvonne Orji Writes a Love Letter to ‘Stern Auntie’ Wanda Sykes," 26 June 2018 Now, a year after the news that fans would be blessed with a follow-up show, Deadline confirms that John Malkovich will costar in The New Pope and that, praise be, Law will return. Michelle Ruiz, Vogue, "Thank Heavens, John Malkovich (and Jude Law) Will Bless The Young Pope Follow-Up, The New Pope," 2 July 2018 Production for Maleficent II has officially begun, and costars Angelina Jolie and Elle Fanning are already giving us a behind-the-scenes look at the upcoming sequel to the revisionist spinoff about Sleeping Beauty's iconic villain. Erica Gonzales, Harper's BAZAAR, "Angelina Jolie and Elle Fanning Just Teased Maleficent II with the Cutest Behind-the-Scenes Photos," 29 May 2018 On Thursday, less than a month after Stamos, 54, became a father for the first time, his Full House and Fuller House costars paid him a visit to meet the littlest Stamos. Eileen Reslen, Good Housekeeping, "John Stamos' Photo of His Son and Costars Has a Special "Full House" Tribute," 11 May 2018

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 above

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Statistics for costar

Last Updated

19 Oct 2018

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Time Traveler for costar

The first known use of costar was in 1888

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Spanish Central: Translation of costar

Comments on costar

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exaggeratedly or childishly emotional

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