Actress Carey Mulligan has put the gown she wore to New York's annual Costume Institute Gala up for sale to raise money for charity.

Mulligan, who wed singer Marcus Mumford last month, made her red carpet debut as a married woman at the Metropolitan Museum of Art's glitzy event, known as the Met Ball, in a futuristic gold and silver Prada piece on May 7th.

And despite making a splash in the dress as one of the evening's co-chairs with Vogue editor Anna Wintour and designer Miuccia Prada, the Drive star is gearing up to say good riddance to the garment.

The 26 year old has put the stunning size 8-10 gown, which is worth an estimated $4,000, on auction site eBay, alongside a photo of her wearing the one-of-a-kind dress.

The proceeds from its sale will go to poverty and injustice charity organization Oxfam.