We can't believe it either, but today is Chloe Moretz's 18th birthday! It's only fitting that her big day also falls on Transformation Tuesday, because the star's style has changed so much since she first started hitting red carpets as a little kid. When she was first starting out as a child actor, she was all about pretty princess dresses, but now she's transformed into a fierce fashionista.
Click through the gallery above to watch Chloe grow up right before your eyes. Then, wish her a happy birthday in the comments section below!