co-star

British  

noun

1. an actor who shares star billing with another

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verb

1. to share star billing (with another actor)

2. (tr) to present as sharing top billing

   the film co-starred Mae West and W. C. Fields

Example Sentences

James might consider himself unlucky to battle the No. 1 seed Oklahoma City Thunder without the aid of his co-star, except for one detail: The Lakers are far from alone.

From The Wall Street Journal • May 7, 2026

Tom Holland and co-star Zendaya visited Inverness during a break in production, popping into an ice cream shop.

From BBC • May 1, 2026

Jake Johnson and Murray Bartlett co-star in what looks to be a fun, suspenseful romp.

From MarketWatch • Apr. 30, 2026

Grande won a Grammy earlier this year for pop duo/group performance for “Defying Gravity” with co-star Cynthia Erivo.

From Los Angeles Times • Apr. 28, 2026

“I’ll bet your co-star is too, Ms. Arden. What do you say, Mr. Mitchell? Care for a beverage?”

From "George" by Alex Gino