In 2003, Seyfried auditioned to play the role of Regina George in Mean Girls; the role eventually went to Rachel McAdams. While she was initially considered to play the lead role of Cady Heron, played by Lindsay Lohan, the producers of the film decided that Seyfried should play Karen Smith, Regina's dim-witted "Plastic" friend and sidekick. The film was a box office success, earning over US$129 million in its theatrical run. Seyfried's performance in the film earned her, along with Lohan, Lacey Chabert, and McAdams, an MTV Movie Award in the category of "Best On-Screen Team". Seyfried auditioned to play the title character on UPN's television series Veronica Mars. The role eventually went to Kristen Bell, and Seyfried portrayed Veronica's murdered best friend Lilly Kane. Her character was only shown in flashbacks. The show's creator, Rob Thomas, felt that Seyfried's portrayal as Lilly Kane was so outstanding that he used her more times in the show than he initially planned in the first season. Seyfried appeared in 10 episodes from 2004 to 2005.