SETH POPPEL/YEARBOOK LIBRARY; Ilya S. Savenok/Getty Images
Anna Hecht
Dec 03, 2015 @ 7:45 am

Happy birthday today to Amanda Seyfried! The actress, who is perhaps best known for acting in the 2008 musical feature film Mama Mia! and for her film debut in the teen comedy Mean Girls (2004), is turning 30 today. Congrats, Amanda!

Since emerging on the acting scene, Seyfried has seen major acting success. She's starred on both TV and the big-screen in major feature films, such as Dear John (2010), Letters to Juliet (2010), Red Riding Hood (2011), Gone (2012), and Les Misérables (2012). Talk about a busy few years!

RELATED: Amanda Seyfried Opens Up About Overcoming Tough Teenage Years In This Month's #InnerStyle Column

What's even more unbelievable is how little Seyfried's youthful appearance has changed since she started out playing the oh-so-quotable, somewhat confused Karen in Mean Girls. Basically, she hasn't aged at all, which we kind of think is a little unfair. To see for yourself, click through Seyfried's changing looks—or lack thereof—through the years, dating back to 1995 when she was just a wee little one with bright green eyes and rosy red cheeks.

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