It's September, which means back to school for most of the country!

Thanks to the expansion of's U.S. Yearbook Collection, we've got our hands on some never-before-seen pics of stars like J.Lo, Leonardo DiCaprio and Sean Penn.

Click on the "Launch Gallery" button below to see them in all their awkward awesomeness:

There's also Taylor Swift, Susan Sarandon, Garth Brooks and young hotties Jake Gyllenhaal, Rob Lowe, Sean Penn, Leonardo DiCaprio and Vince Vaughn from their high school days.

Check out over 40 pics of your favorite stars, before they were stars!

And for more photos, check out's U.S. Yearbook Collection.

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