costar

or co-star

[noun koh-stahr; verb koh-stahr]
noun
  1. a performer, especially an actor or actress, who shares star billing with another.
  2. a performer whose status is slightly below that of a star.
verb (used without object), co·starred, co·star·ring.
  1. to share star billing with another performer.
  2. to receive billing of slightly less status than that of a star.
verb (used with object), co·starred, co·star·ring.
  1. to present (two or more actors) as having equal billing or prominence.
  2. to present as having slightly less status than that of a star.

Origin of costar

An Americanism dating back to 1915–20; co- + star
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Contemporary Examples of costar

Historical Examples of costar