The lead character was originally going to be in a novel written by show creator, Rob Thomas.


The theme song is "We Used to be Friends" by the Dandy Warhols.


The episode "Russkie Business" (episode 1.15) features a guest turn by Alyson Hannigan. Denise Richards was considered for the role. Tara Reid was also considered.


In original project notes and the original pilot script for the show, there were some name changes. Lilly's name was Samantha, Lianne Mars's was Rebecca, then Abbie, Wallace's last name was Collier, Logan's last name was Hewitt, and the last name of the Kane's was Cain, then Caine.


In the original pilot, Lilly's body was dumped into a river and found later. The network found this a little too disturbing, especially because it involved Jake Kane disposing of his own daughter's body, and had her body be left on the Kane property.


The pilot script describes Veronica the following way: "She is not cute. She is sexy. Tough. Prematurely jaded. Angelina Jolie at 17."


The character of Meg was created specifically for Alona Tal. She auditioned for Veronica, and was Rob Thomas's second choice for the role. He liked her so much he made a recurring role for her.


Amanda Seyfried initially auditioned for the role of Veronica Mars.


Jason Dohring initially auditioned for the role of Duncan while 'Teddy Dunn' initially auditioned for the role of Logan.


The only two actresses considered for the role of Kendall Casablancas were Heather Graham and Charisma Carpenter. Graham was working on "Emily's Reasons Why Not" (2006), and Carpenter was an actual fan of "Veronica Mars", so she ended up being cast in the role.


The car that Veronica drives is a convertible Chrysler LeBaron


Concepts included in the original project notes for the show that were later dropped include Veronica being 13 when Lilly was murdered, Keith being fired because of evidence disappearing from the police station, with hints that Don Lamb was behind it, Strom Jenkins, a character who called in the Abel Koontz tip, and Veronica finding that Strom Jenkins, Don Lamb, and Jake Kane were part of a larger conspiracy to cover up Lilly's death.


UPN, the network that airs Veronica Mars, were concerned during early episodes that viewers would confuse Teddy Dunn and Jason Dohring, who play Duncan and Logan, respectively. A color code was created where Dunn wore blues, and Dohring wore earth tones (greens, browns, etc). The color code still stands today.


Logan drives a yellow Nissan XTerra S.


Originally, according to creator Rob Thomas, Veronica and Duncan were going to be related. After it got picked up by UPN, a network channel, and not by HBO, Showtime, or FX, they decided not to push it into ""Twin Peaks" (1990) territory".


Amanda Noret, the actress who plays Madison Sinclair, is the real-life cousin of the real Shelly Promroy.