Auditioned for the lead role of Kelli for the horror remake Black Christmas, but lost out to Katie Cassidy.
Beat several actresses for the role of Sophie in the film Mamma Mia! (2008). One of the actresses was fellow co-star Rachel McAdams who acted alongside Seyfried in the film Mean Girls (2004). In this film, McAdams beat Seyfried for the role of Regina George.
Her special skills and interest include dancing, singing and tennis.
While living in Allentown, Pennsylvania, got to see musicals in Manhattan such as Cats and Les Miserables, which is her all-time favorite musical.
Trained in classical opera for two years and studied under a Broadway voice coach for almost five years.
If she were not into acting, she would have liked to study meteorology. She admits being fascinated by weather.
Missed 70 school days during her senior year in high school due to her acting commitments.
As a child model, she initially signed with Image International Agency in Allentown, Pennsylvania before working under Bethlehem's Pro Model Agency and eventually with Wilhelmina agency in New York.
Originally auditioned for the title role on Veronica Mars but lost the place to Kristen Bell. Instead of playing Veronica she was offered the role of Lilly, Veronica's dead best friend. She was so popular in this role she was brought back more often than ever expected.
In May 2008, she dressed up as Alice of Alice in Wonderland for a seven-page spread for Vogue Italia. That same month, she was also featured in the promotional poster for her movie musical Mamma Mia!.
Graduated from William Allen High School in Allentown, Pennsylvania in 2003.
Correct pronunciation of her last name is "Sigh-Frid.".
Good friends with American Gun (2005) co-star Nikki Reed.
She began modeling at age 11.
Was considered for the roles of Regina and Cady in Mean Girls (2004). These roles eventually went to Rachel McAdams and Lindsay Lohan, respectively.