1.First and foremost, here's Freddie Prinze Jr. pre-gray:

Never forget his short-lived spiky frosted tips era.

And here he is now in his silver fox era:

2.JC Chasez as you probably remember him in his chin-strap era:

Just a bunch of silly boys who can't figure out how to use a wagon!

And here he is now in his silver fox era:

He was actually at the VMAs this year, and I'm sad to report he dyed his luscious locks!

3.Here's Steve Carell in the early 2000s:

Truly his brunette era.

And here he is now in his silver fox era:

4.Let's talk about Patrick Dempsey:

Ohh lala McDreamy!

And here he is now in his silver fox era:

5.Now for Seth Green:

What a bad boy!

And here he is in his silver (beard) era:

6.Oscar Isaac will always be attractive:

Oh so serious!

And here he is now in his silver fox era:

7.Here we have Josh Hartnett:

Silly boy doesn't know how to use a chair!

And here he is now entering his silver fox era:

8.Let's look into Matt LeBlanc:

What a cool dude!

And here he is in his silver fox era:

9.We have Chris Pine:

Here's what he looked like pre-gray:

And here he is now in his silver fox era:

10.Next up is Mark Hoppus:

Here's how you probably remember him:

And here he is now in his silver fox era:

11.Let's zoom in on Seth Rogen:

So dramatic!

And here he is now in his silver fox era:

12.Let's talk about Johnny Knoxville:

Here's how you probably remember him:

And here he is now in his silver fox era:

13.If we're talking about Johnny Knoxville, then we obviously have to talk about Steve-O:

Here he was then:

And here he is now in his silver fox era:

14.Joey Fatone is up next:

I personally love his Ronald McDonald era.

And here he is in his silver fox era:

15.Next up we have 2/4 of the members of 98 Degrees:

Justin and Drew are both gray now:

16.Let's talk about Jesse Bradford:

This was him then:

And here he is in his silver (beard) era:

17.We got Rider Strong:

Here's how you probably remember him:

And here he is now in his silver fox era:

18.Now for Joey Lawrence:

Here he is then:

And here he is now in his silver fox era:

19.Remember his little Lawrence brother, Andrew Lawrence?

He's gray, too:

20.Let's talk about Devon Sawa:

Here he is with his cute lil' haircut and earring:

And here he is now in his silver fox era:

21.Brandon Boyd is from the band Incubus:

Remember "Drive"?

And here he is in his silver fox era:

22.Next up is DJ from Roseanne aka Michael Fishman:

Here's how you probably remember him:

And here he is now in his silver fox era:

23.And lastly, we've got Ben Stiller:

This was him then:

And here he is in his silver fox era: