Amanda Michelle Seyfried was born on December 3, 1985, in Allentown, Lehigh County, Pennsylvania, United States. Her father worked as a pharmacist, while her mother was a therapist. She has a sister, Jennifer Seyfried, who is a musician and was part of the band Love City on MySpace.

She began her career as a model at the age of 11. Until 2004, she appeared in various productions in supporting roles. Her major career breakthrough came in 2004 when she portrayed Karen Smith in Mean Girls, a role that brought her widespread recognition and connected her early on with young stars such as Lindsay Lohan and Rachel McAdams.

In 2008, she landed her first leading role as Sophie Sheridan in Mamma Mia!, sharing the screen with Meryl Streep. This collaboration became one of the defining professional relationships of her career, as she later reunited with Streep in the sequel. In 2009, she starred alongside Megan Fox in Jennifer's Body, a cult film that showcased a darker side of her screen presence.

Amanda Seyfried also made guest appearances in popular television series such as House, M.D., Justice, Law & Order: Special Victims Unit, CSI: Crime Scene Investigation, and Wildfire, expanding her visibility across both television and cinema during her early career years.

During her childhood, she reportedly had a crush on Leonardo DiCaprio, whom she later came to regard as one of the defining figures of her generation.

In 2011, she starred opposite Gary Oldman in Red Riding Hood, followed by a science-fiction role alongside Justin Timberlake in In Time. The same period saw her romantic drama performance opposite Channing Tatum in Dear John, further strengthening her status as a leading actress in mainstream cinema.

In 2013, she appeared in Les Misérables, an adaptation of Victor Hugo’s novel, acting alongside Hugh Jackman, Anne Hathaway, Russell Crowe, and Helena Bonham Carter. That same year, she portrayed 1970s adult film star Linda Lovelace in Lovelace, demonstrating her willingness to take on challenging and unconventional roles.

She later collaborated with actors known for dramatic and independent cinema, including Julianne Moore in Chloe and Eddie Redmayne in While We're Young, reinforcing her reputation as a versatile performer capable of balancing commercial success with character-driven storytelling.

Filmography

2000–2001 - As the World Turns
2002–2003 - All My Children
2004 - Mean Girls
2004 - Law & Order: SVU – “Outcry”
2004–2006 - Veronica Mars
2005 - Nine Lives
2005 - House – “Detox”
2005 - American Gun
2006 - Alpha Dog
2006 - Wildfire
2006 - CSI – “Rashomama”
2006 - Gypsies, Tramps & Thieves
2006 - Justice – “Pretty Woman”
2006 - Big Love
2008 - Solstice
2008 - Mamma Mia!
2008 - Official Selection
2008 - American Dad! – “Escape from Pearl Bailey”
2009 - Chloe
2009 - Boogie Woogie
2009 - Jennifer's Body
2010 - A Bag of Hammers
2010 - Dear John
2010 - Letters to Juliet
2011 - A Woman of No Importance
2011 - Red Riding Hood
2011 - In Time
2012 - Gone
2013 - Les Misérables
2013 - Lovelace
2013 - The Big Wedding
2014 - Three Little Words
2014 - Z for Zachariah
2014 - A Million Ways to Die in the West
2015 - Ted 2
2015 - While We're Young

Source: Biyografiler.com