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19 Celebrities Who Are Older Than You Think

September 24th, 2013 4:11pm EDT

Alyson Hannigan

Alyson Hannigan became a star in the 90s on Buffy the Vampire Slayer and as a girl who did questionable things with a flute in American Pie. The mother of two looks great at 39!

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Photo Credits: PR Photos, Pacific Coast News, WENN

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