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
Dwayne Johnson
Katy Perry (center) with her sister (left) and mother (right)
Miley Cyrus
Maisie Williams
Beyoncé
Reese Witherspoon
Amanda Seyfried