Ashley's previously spoken about how she donated her high school prom dress and now she's part of DonateMyDress.org to encourage others to do the same.
Today, Ashley will be part of a live twitter Q&A session, taking place at 4.30 pm EST/ 7.30 pm PST /12.30 am GMT, benefiting the charity.
Make sure to tweet your questions to the Alice Cullen fashionista @donatemydress
P.s. Super sparkle points to anyone who gets "what in the Hale was up with your New Moon costume choices?" (or a version thereof) asked :)