It's possible that:
* The spelling is incorrect. Double check the spelling of the name.
* The person is not a well-known actor. There may be many people with this name who have not been in major film or television projects.
* They may be involved in other aspects of the entertainment industry. They might be a writer, director, producer, or work behind the scenes in another capacity.
To help me find more information, please provide:
* Any other details you know about Marc Breaux: Is he a comedian, musician, or known for a particular type of role?
* Is there a specific project you're thinking of? This could help narrow the search.
With more information, I can try to find any available details about his movie and television projects.