'Twilight' Star Ashley Greene Opens Her Closet For Charity

Have you ever sat up late at night, gripped by the all-consuming desire to steal Ashley Greene's clothes? Well... so have we. (And no, gentlemen, we don't mean that way.) And it turns out that we're not the only ones to notice that the "Twilight" star has some seriously fab fashion sense—both on and off-screen—because on Oct. 15, fans can duke it out online for a chance to wear the amazing teal Donna Karan dress (pictured; click past the jump to see a full-length shot) she sported last month at Mercedes-Benz Fashion Week in New York City!

But it's for charity, so you'll have to be polite about it.

The lucky winner of the frock will also score a collection of mark cosmetics (Ashley is one of the brand's ambassadors), in addition to signed "Twilight" merch (an "Eclipse" T-shirt and the "New Moon" DVD and soundtrack).

The dress is just one of several celeb-sponsored items to be featured in a special online auction for Breast Cancer Awareness Month, with proceeds going to support breast cancer prevention and treatment—so those who aren't into vampire fashion can support the cause by bidding on other fun stuff, like a once-in-a-lifetime chance to join Reese Witherspoon's red-carpet entourage. (Hopefully whoever gets this one will ask for the inside scoop on Jake Gyllenhaal's makeout skills. The public needs to know!)

Reese and Ashley aren't the only familiar faces involved with the awareness-raising campaign; the program also boasts celeb supporters like Fergie, Cher and Kristin Chenoweth. So whether you want to raid Ashley's wardrobe or just watch the fun, click over to the auction site to see what's happening! (Reminder: The auction for Ashley's dress will be held Oct. 15-25!)

Are you as impressed by Ashley's social conscience as we are?