Check out these cute photos of celebrities when they were young! Can you guess without looking at the caption?

Jack Black
Mark Ruffalo
Halle Berry
Heidi Klum
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Dwayne Johnson
Katy Perry (center) with her sister (left) and mother (right)
Miley Cyrus
Maisie Williams
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Beyoncé
Reese Witherspoon
Amanda Seyfried