Long before they were the stars of this weekend's "Grown Ups 2," Adam Sandler, David Spade and the rest of the cast had awkward their teen years too.

We tracked down yearbook pics of the stars, including the two mentioned above, Kevin James, Maya Rudolph, Shaq and Steve Austin -- plus Milo Ventimiglia and Andy Samberg, who both make cameos in the flick.

Look at Sandler's fro -- it's pretty easy to see why he was voted Best Hair in high school!

And, speaking of hair, check out the gallery above to see what "Stone Cold" Steve looked like when he actually had some.

Will you be seeing "Grown Ups 2" this weekend ... or are you leaning towards "Pacific Rim"? Sound off below!

Watch a sneak peek clip below:


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