It's possible there is a lesser-known actor with that name, or you may be thinking of a different actor altogether.
Could you provide more details about the actor you're interested in, such as:
* Full name: Is it Mark Warren or a different name?
* Movies or TV shows he has been in: Do you remember any of his work?
* Any other details: Do you know anything about his age or family background?
With more information, I may be able to help you find the actor you are looking for.