20 Stars Who've Gotten Sexier

We're supposed to get wiser as we get older, but sexier? Not so much. But luck (and a few flat irons, it seems) has been on the side of these celebs, who have gotten hotter with each passing year. Nerve runs down the 20 best transformations:

1. Mary-Louise Parker: "Cute is only halfway to sexy," and age seems to have gotten this actress the other half of the way.
2. Robert Downey Jr: Bad boys are supposed to be hot, but this one just looked burnt out during his trouble-making days.

3. Marisa Tomei: This actress proved she's only gotten hotter by getting naked in The Wrestler.
4. Tina Fey: From awkwardly lovable to glammed-up and lovable.
5. Jon Stewart: He lost the "floppy-haired/bad-goateed-doofus look" of his MTV days by going gray.
6. Will Smith: His Fresh Prince character wasn't exactly a sex symbol.
7. Justin Timberlake: You could attribute the perm and the corn rows to bad teenage decisions...
8. Kim Cattrall: At 30, she was just another brunette. At 50...
9. Matthew Fox: Thank goodness this fox lost the Party of Five slacker look.
10. Laura Dern: Losing her serious case of bad hair did wonders.

Click here for the other notties-to-hotties.
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