Demetri Martin is a person. He lives on either side of the country, near the water (but not that close to it). He writes and tells jokes. He worked as a writer on Late Night with Conan O’Brien. He worked as a contributor on The Daily Show with Jon Stewart. He did stand-up specials on TV. Then he did his own TV show called Important Things with Demetri Martin. He was an actor in a few movies. He has brown hair.