Hope this is a serious question :P
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Well...she began as a child model and later she started with acting ;)
I first recognized her 2003 in the comedy "Mean Girls" as Karen (she auditioned as Regina George) even though she had some earlier roles...
Her worldwide breakthrough was for sure the romantic comedy Mamma Mia! with Meryl Streep.
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Seyfried started her modeling career at age eleven. Next she act in the soap opera The Guiding Light. In 2000 she was assigned the role of Lucy Montgomery on As the World Turns. From 2002 to 2003 she played the role of Joni Stafford on All My Children on ABC.