I can not figure out why you all are saying that being an actor is not appropriate for a Christian.
What is sinful about the profession? As long as our hypothetical Christian Actor is careful about the roles he picks I see not problem. Think about it, a Christian Actor could have played any role on The Waltons, or Christy, etc. Likewise, there are plenty of movies produced that are not offensive to solid Christian ethics and morals.
The same goes for being a Lawyer. My wife currently works for a Christian who happens to be a Lawyer. He is one of the finest Christian men that I know.
When God saves a person He does not expect each and everyone to become a Pastor, Missionary, Seminary Professor, etc. However, He does expect them to be His representative in their fields of influence. Therefore, if you are a Doctor you are God's representative to the medical community. If you are a Lawyer then you are God's representative to the legal community. If you are an Actor then you are God's representative to the entertainment community. the list goes on and on.
The point is that Christians, no matter what job they perform, must always remember that they wear Christ's name and represent Him to a watching world. Therefore, we must live our lives according to the ethical and moral principles of the Bible and not bring shame upon the name of Christ.