system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 why some actors get famous for one role and then are never in anything else, while other extremely famous actors keep getting large roles.

Thanks :)
gpt
- Their agent hasn't sold them enough to other producers for films
- They're not that talented, or only skilled for one type of role
- They're not willing to commit/travel/practice etc.
- The market is over saturated with actors.