It's possible:
* The name is slightly incorrect. Perhaps there's a different spelling, or a middle name involved. Could you double-check the name?
* The actor is relatively unknown. He might have only been in smaller productions, or not yet had a major breakthrough role.
* He works primarily in theatre or other mediums.
To help you find the right Rupert Hill, please provide more information if possible:
* Any other details about him? (e.g., his age, nationality, type of roles he usually plays)
* Any specific movie or TV show you might have seen him in?
With more information, I can assist you in finding the actor you are looking for.