Zach Braff, American-actor, director, comedian and screenwriter turns 46 today. He is best known for his portrayal as Dr John Michael "JD" Dorian on the NBC medical-comedy drama Scrubs (2001-2010). On the occasion of his 46th birthday, let's hear some of Zach Braff's quotes and sayings as Dr John Michael "JD" Dorian on the NBC medical-comedy drama Scrubs.