Veronica Mars is the fictional protagonist, occasional narrator, and antiheroine of the American television series Veronica Mars, which aired on UPN from 2004 to 2006 and on The CW from 2006 to 2007. The character was portrayed by Kristen Bell through the duration of the series. Following the show's cancellation, Bell reprised her role in the 2014 film continuation and the 2019 revival that was released on Hulu. The character, created by Rob Thomas, was originally male and the protagonist of his unproduced novel Untitled Rob Thomas Teen Detective Novel, which eventually became the basis of the series. After the work transitioned from novel to television series, Thomas changed the character's gender from male to female because he believed that a noir piece told from a female point of view would be more interesting.

Veronica Mars is an American teen noir mystery drama television series created by screenwriter Rob Thomas. The series is set in the fictional town of Neptune, California, and stars Kristen Bell as the eponymous character. The series premiered on September 22, 2004, during television network UPN's final two years, and ended on May 22, 2007, after a season on UPN's successor, The CW, airing for three seasons total. Veronica Mars was produced by Warner Bros. Television, Silver Pictures Television, Stu Segall Productions, and Rob Thomas Productions. Joel Silver and Thomas were executive producers for the entire run of the series, while Diane Ruggiero was promoted in the third season.