and 2011, she was on  HBO 's series  Big Love . After that, Seyfried appeared in her breakthrough role in the 2008 musical feature film  Mamma Mia! . Other appearances include leading roles in  Jennifer's Body  (2009),  Chloe  (2009),  Dear John  (2010),  Letters to Juliet  (2010),  Red Riding Hood  (2011), and  In