castmate
Noun
Meaning
castmate (plural castmates)
Someone with whom one performs together, as a member of a cast
Examples
I don't think it's unusual to spend time with your castmate.
Despite a distinguished acting career, in which he has appeared in a number of celebrated films, Steve Buscemi is also a frequent Adam Sandler castmate.
The pair's "Lord of the Rings" castmate also paid tribute, posting a still from "The Lord of the Rings: The Return of The King" in which he, Wood, shared a scene with Sir Ian and adding the caption: "Off to the Grey Havens goes dear Ian Holm.
Though uncredited, Murphy provided vocal work on SNL castmate Joe Piscopo 's comedy single, "The Honeymooners Rap."
"And so me being this new castmate and we kind of just all meshed really well together."
That castmate was not part of the 2014 show.