The choice of actors to play particular roles in a play or movie WordNet 3.0 & Open English WordNet

In the performing arts industry such as theatre, film, or television, casting, or a casting call, is a pre-production process for selecting a certain type of actor, dancer, singer, or extra for a particular role or part in a script, screenplay, or teleplay. Wikipedia

The process of selecting a cast of actors, or other visual talent such as models for a photo shoot Wikipedia Disambiguation

Pre-production process for selecting actors, dancers, singers, or extras for roles or parts in a script, screenplay, or teleplay Wikidata

The act or process of selecting actors, singers, dancers, models, etc. Wiktionary