(2008) and reprised her role in the sequel, Mamma Mia! Seyfried had lead roles in the black comedy horror Jennifer's Body (2009), the erotic thriller Chloe (2009), the romantic war drama Dear John (2010), and the romantic drama Letters to Juliet (2010).
She starred in the dark fantasy historical romance Red Riding Hood (2011), the dystopian science fiction thriller In Time (2011), the thriller Gone (2012), the musical drama Les Misérables (2012), the biographical drama Lovelace (2013), and in the Seth Mac Farlane comedies A Million Ways to Die in the West (2014) and Ted 2 (2015).
Between 20, Seyfried starred on the HBO drama series Big Love.
Seyfried appeared in 10 episodes from 2004 to 2005.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.Seyfried's performance in the film earned her, along with Lohan, Lacey Chabert, and Mc Adams, an MTV Movie Award in the category of "Best On-Screen Team"., a romantic comedy film adaptation of the 1999 musical of the same name. She played Paige Oppenheimer, one of the lead roles in the ensemble movie.The movie was originally shown on June 26, 2009, at Edinburgh International Film Festival, and was shown in US theaters April 25, 2010.