In 2004, Seyfried made her film debut in Mean Girls playing Karen Smith, the ditsiest of the so called 'plastics'. She then went on to other films including Nine Lives (2005) and Alpha Dog (2006). In 2006, she landed a lead role on HBO's popular television series Big Love. After that, Seyfried appeared as Sophie Sheridan in the 2008 musical feature film Mamma Mia!. Other recent notable appearances include lead roles in Jennifer's Body and Chloe in 2009, and one of the two lead roles in Dear John the following year. 
