1. costar - Noun
2. costar - Verb
(acting) a person who shares star billing
The once famous actor objected to his costar having a bigger dressing room.
(acting) a person who slightly lacks the status to be considered a star
Alas, always a costar but never a star.
costar (third-person singular simple present costars, present participle costarring, simple past and past participle costarred)
to perform with the billing of a costar.
People thought his career was over but now he will get to costar on Broadway next month.
As a teenager, Hannigan babysat for her future How I Met Your Mother costar Bob Saget 's children. Source: Internet
Allen, Appendix E. COSTAR on display at the National Air and Space Museum Because of the way the HST's instruments were designed, two different sets of correctors were required. Source: Internet
Before that, Gaga was engaged to talent agent Christian Carino Rumors also flew during awards season 2019 that Gaga had a costar Bradley Cooper. Source: Internet
But considering that is said to tie directly to Doctor Strange in the Multiverse of Madness — in which Olsen will costar Benedict Cumberbatch — it's safe to say things are going to get a lot whackier than we can imagine. Source: Internet
Adam Sandler's canine costar from 'The Meyerowitz Stories' has won a coveted Palm Dog award. Source: Internet
Emma Watson’s crush on her „Harry Potter“ costar Tom Felton has been well-documented. Source: Internet