Demetri Martin is an American comedian, actor, artist, musician, writer and humorist. Martin is best known for his work as a stand-up comedian, contributor on The Daily Show and for his Comedy Central show Important Things with Demetri Martin.

Martin is known for being an unconventional stand-up comic. He uses extensive wordplay (particularly paraprosdokians), one-liners, and drawings on a "large pad", as well as accompanying his jokes with music on either guitar, harmonica, piano, keyboard, glockenspiel, toy bells, ukulele, or tambourine, sometimes all at once. He has cited comedian Steven Wright as an important influence (both use deadpan one-liners in their acts) and he is also a fan of Bill Cosby.