* The name is misspelled: Double-check the spelling and try searching again.
* He's not as famous: If he's a less prominent actor, his birthdate might not be widely available online.
* He might be a stage actor: Many actors work in regional or local theaters and their information isn't as easily found.
To help me find the right Matthew Walker, could you tell me:
* Any additional information you have: Do you know anything else about him (e.g., movies he's been in, any specific roles, the time period he might have been active)?
* Where you saw his name: Was it in a movie credit, a playbill, or online somewhere?
With more information, I might be able to help you find the right Matthew Walker and his birthdate!