1. Leonardo DiCaprio then:

He was an Academy Award–nominated actor and environmentalist who dated young models.
Now:

He is an Academy Award winning actor and environmentalist who dates young models.
2. Oscar Isaac then:

Starred in a religious movie.
Now:

Starred in a religious space movie.
3. Chris Pratt then:

Starred in two popular teen dramas.
Now:

The star of two multimillion-dollar film franchises.
4. Michael B. Jordan then:

Boy next door cuteness.
Now:

Man next door you thirst after.
5. Justin Timberlake then:

Didn't relax his hair.
Now:

Won't stop relaxing his hair.
6. Idris Elba then:

Hot.
Now:

Still hot.
7. Jared Leto then:

An ageless emo vampire.
Now:

An ageless 19th-century dandy vampire.
8. Drake then:

A boy.
Now:

A man.
9. Channing Tatum then:

Thumby.
Now:

Thumbish.
10. Taylor Lautner then:

Somebody get this boy a blow-dryer!
Now:

Who?
11. Ryan Gosling then:

He is wearing one of those tuxedo T-shirts.
Now:

He can wear me out anytime.
12. Daniel Radcliffe then:

That is one baggy suit.
Now:

Proof that puberty is literally the best.
13. Brad Pitt then:

Mess me up.
Now:

He wears purple-tinted glasses.
14. Nick Jonas then:

Those curls.
Now:

That look.
15. Pete Wentz then:

Weird hair.
16. Now:

Weird hair.
17. Jon Hamm then:

Interesting suit but still would do.
Now:

Interesting hairstyle but still would do.
18. The Rock then:

The best.
Now:

The best.
19. David Beckham then:

Jesus Christ that hair.
Now:

Aging surprisingly well for a white dude.
20. Bradley Cooper then:

Cute.
Now:

Hot.
21. Zac Efron then:

Just another Disney Channel teen.
Now:

Just another thirst trap.