co-star

British  

noun

1. an actor who shares star billing with another

---

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

He became a regular on The Only Way Is Essex after joining the cast as a friend of Vas J Morgan, and was the ex-partner of co-star Chloe Lewis.

From BBC • May 7, 2026

Oklahoma City gave them a rusty, tin-man version of SGA for a game and continued playing without his injured co-star Jalen Williams.

From Los Angeles Times • May 6, 2026

Annette Benning and Ed Harris co-star, so at least Sheridan is — in all sincerity — doing an A+ job of keeping Hollywood’s greatest actors of a certain age employed.

From MarketWatch • Apr. 30, 2026

You just can’t have a scene without a co-star.

From "Better Nate Than Ever" by Tim Federle