In the film Martin plays Elliot Tiber, a closeted gay artist who has given up his ambitions in the city to move upstate and help his old-world Jewish family run their Catskill Mountains motel. On April 25, 2011, Martin released his first book, titled This Is a Book.
Martin played a small role in the 2011 film Contagion.
In 2004, Martin had his own Comedy Central Presents stand-up special. In the first, he performed in traditional stand-up comedy fashion.
In the second segment, he used humorous drawings as visual aids, which would serve either as the punchline or a background.
Watch Now Demetri Martin's conceptual sketch-comedy show, which is augmented by stand-up, music and animation, begins with an exploration of "Timing" that includes a time-traveling gigolo and a bit about an ill-tempered actor featuring Amanda Peet.
Demetri Martin rose to relative obscurity when he started doing stand-up comedy in New York City at the end of the 20th Century.
He will play the lead in the film Moon People, a pitch that he sold to Columbia Pictures.During the third segment, he played a guitar and put on a pseudo-play where he would strum his guitar while alternating between playing harmonica and talking; some of his comedian friends dressed as fairies and dragons acted according to the story he was telling, detailing the magical land from where his jokes came. Starting in late 2005, he was credited as a contributor on The Daily Show, on which he appeared as the named "Senior Youth Correspondent" and hosted a segment called "Trendspotting." He used this segment to talk about so-called hip trends among youth such as hookahs, wine, guerilla marketing and Xbox 360.A piece about social networking featured his profile on My Space.Martin has stated that Important Things will not return for a third season.Prior to completing work on his second season, Martin starred in the comedy-drama film Taking Woodstock (2009), directed by Ang Lee, which premiered at the 2009 Cannes Film Festival.