* He's a lesser-known actor: There could be an actor named Matt Walton who has worked on smaller projects or has a smaller role in a more well-known production.
* Name misspelling: Perhaps you're thinking of an actor with a slightly different name. Could you double-check the spelling?
* He's not an actor: It's also possible that the person you're thinking of isn't an actor at all.
To help me find the actor you're looking for, could you provide more context or information? For example:
* Any movies or TV shows he has been in?
* Any other details about his career?
* A photo of him?
With more information, I might be able to help you identify the actor.