Chloe Sullivan is a fictional character from the television series Smallville. Series regular Allison Mack has portrayed the character since the pilot episode; two other actresses performed the role of Chloe Sullivan as a child. The character was created exclusively for Smallville, by series developers Alfred Gough and Miles Millar. By the time of the tenth season, she and Clark Kent are the only two series regulars from the first season of the show, though Mack only signed on for five episodes of the tenth and final season. Chloe has also appeared in various literature based on Smallville, an internet series, and DC Comics Universe comic books. In Smallville, Chloe is Clark Kent's best friend, and the editor of the high school newspaper the Torch; she notices that the meteor rocks (kryptonite) are mutating the citizens of Smallville. She generally teams up with Clark and Pete Ross in tracking and stopping meteor-infected people from harming other citizens. In the first five seasons, C...