Looking to benefit a great cause, Kristen Stewart has donated her “Twilight Saga: Breaking Dawn Part 2” LA Premiere dress to an online auction.

The “Adventureland” babe’s Zuhair Murad gown will be sold to raise money for victims of Hurricane Sandy.

Fans of KStew can locate her gorgeous garment (she even autographed it!) on the Robin Hood Foundation’s website, and bidding ends on December 20th.

Meanwhile, Kristen also showed up at Madison Square Garden last week for the big 12-12-12 Concert for Sandy Relief to help raise even more money for the charity.