The dress Amy Winehouse wore when she married ex-husband Blake Fielder-Civil has been stolen, a spokesman has confirmed.
It was taken while being kept in storage at the singer's former home in north London.
Another dress, worn by Amy Winehouse on an episode of Later... with Jools Holland, is also missing.
The Metropolitan Police say they have yet to receive a formal allegation about the thefts.
After the singer's death in July 2011, all her possessions were catalogued and placed in storage at her house in Camden.
Over the course of the last year, those possessions have been moved elsewhere.
The dresses are not thought to have been taken as a result of any break-in at the property.
The house is now empty and ready to be sold but still has round the clock security.
The dresses were among items earmarked for a fundraising event in New York early next year.
Other items are to be auctioned at a similar event in central London this month to raise money for the Amy Winehouse Foundation.
The charity was set up by Amy's father Mitch Winehouse.
A spokesman said: "People need to know they are not supposed to be out there on the market and they should not try to buy them.
"The dress Amy wore on the cover of Back To Black sold for £40,000 last year and the money went to the foundation, and another dress sold for £30,000 so the wedding dress could have raised as much as £100,000."
The star died in July 2011 of alcohol poisoning at the age of 27.
A verdict of misadventure was recorded after the inquest heard the singer had 416mg of alcohol per 100ml of blood.