Mark Piznarski was a director of television series and films. He directed the pilots of the original versions of Gossip Girl and Veronica Mars, as well as 13 other episodes of Gossip Girl. In addition, he also directed the pilots of Relativity, Still Life, and The Lying Game. He also directed episodes of NYPD Blue, American Dreams, and Riverdale.
Piznarski also directed films in addition to episodes of television series. His work in film includes "Looking for Sunday" and "Here on Earth."