Amanda Michelle Seyfried ( SY-fred; born December 3, 1985) is an American actress, model, and singer-songwriter. She began her career as a model when she was 11, then her acting career at 15 with recurring parts on the soap operas As the World Turns and All My Children.

In 2004, Seyfried made her movie debut in the teen comedy Mean Girls. Her subsequent supporting roles were in independent films, such as the drama Nine Lives (2005) and the crime drama Alpha Dog (2006). She also had a recurring role on the UPN television series Veronica Mars (2004–06). Between 2006 and 2011, Seyfried starred on the HBO drama series Big Love and appeared in the musical feature film Mamma Mia! (2008).

Seyfried had leading roles in the black comedy horror film Jennifer's Body (2009), as a call girl in the erotic thriller Chloe (2009), the romantic drama-war film Dear John (2010), and the romantic drama Letters to Juliet (2010). She then starred in the dark fantasy historical romance Red Riding Hood (2011), the dystopian sci-fi thriller In Time (2011), the thriller Gone (2012), the musical drama film Les Misérables (2012), the biographical drama Lovelace (2013), and in the Seth MacFarlane comedies A Million Ways to Die in the West (2014) and Ted 2 (2015). She also starred in Fathers and Daughters (2016).