When young stars grow up and get hot, we all triumph because it gives us hope for our own futures and getting through awkward phases. No pictures can exemplify this more than ones from high school, and thanks to BuzzFeed's video of celebrity prom photos featuring side-by-side looks at stars at their big dances vs. now, we can see some huge transformations. For some celebs like Taylor Swift, Blake Lively, and George Clooney, not much has changed, but others are nearly unrecognizable. Have you seen Ellen DeGeneres with long, dark hair and a dress in the past decade? No, but that was her look in high school. What about Bruce Willis with a full head of hair? It's been a long time.
Check out all of those stars, plus Jon Hamm, Jennifer Aniston, Kim Kardashian, Brad Pitt, Matthew McConaughey, Meryl Streep, Scarlett Johansson, and many more in the video below. Your jaw will drop from how similar some celebrities look — especially stars who never age — and those who are completely different now that they're A-list actors. You may even see a few dresses that you'd like to see celebs rock on the red carpet now. The cotton ball-looking embellishments on Jessica Alba's outfit probably shouldn't make an appearance in this day and age, but if anyone can pull it off, it's her.