Dean: Him? Really?
Castiel: You should have seen Luke.
Dean and Castiel discussing prophets.
in The Monster at the End of This Book

Luke was a prophet of the Lord.


According to Castiel, Luke possessed similar, if not worse, lifestyle and habits as the modern day prophet, Chuck Shurley. Other than this snippet, not much is known about him.

According to tradition, Luke authored two books in the Bible: the gospel that bears his name, and the Acts of the Apostles.