10 Former Child Stars Who Are All Grown Up (And Hot) Now

A brief overview of that bewildering condition known as NPH Disease.

1. Neil Patrick Harris

From boy wonder to "Boy, I wonder what he looks like naked," NPH (for which this bizarre affliction is named) is at the tippy-top of the all-grown-up-and-hot-now food chain.

2. David Krumholtz

Raise your hand if you had a crush on David before he took a sudden detour into Hot-town.

3. Alyson Hannigan and Seth Green

For the purpose of this exercise (and, y'know, Buffy fans), these two have briefly become one entity. Complete equals in former cuteness and current "Um... May we make out, please?"-ness.

4. Jaleel White

.Suddenly we find ourselves wishing he had done that.

5. Mercedes McNab

Thus we learn that any role in an Addams Family movie leads to astonishing hotness later in life.

6. Joseph Gordon-Levitt

Okay, so we all knew he'd grow up to be a hottie... but somehow it's still a shock to the system. Joseph's NPH Disease is clearly far more advanced than most.

7. Johnny Galecki

Again, we knew his hotness was inevitable. But did we realize his hair would never change?

8. Danielle Harris

This former horror princess is now a grown-up-and-hot horror queen.

9. Wil Wheaton

Once a little geek, now an irresistible beardy geek. We're detecting magic.

10. Miko Hughes

Perhaps the most astounding case of NPH Disease yet: The world's cutest kid in the history of cinema is now one of the world's hottest DJ's in... well, the history of DJ's. Who are hot.