Chloe Sullivan is a fictional character in the television series Smallville, which is based on the Superman and Superboy comics published by DC Comics. Portrayed by series regular Allison Mack, Chloe was an original character created exclusively for Smallville by series developers Alfred Gough and Miles Millar. Other than main protagonist Clark Kent, Chloe is the only main character to last the whole duration of the show, though Mack signed on for only five episodes in the tenth and final season. The character has also appeared in various literature based on Smallville, a web series, and was then later adapted back into the original Superman comics which inspired Smallville.