Here's a surefire way to start cashing in on the royal nuptials: Put the queen's undies up for sale.

If you're in the market for some regal granny panties, celebrity gossip site TMZ reports that the estate of a deceased man in Florida is auctioning off a pair that once belonged to Queen Elizabeth II.

The bloomers, which are cream with a lace trim, belonged to Miami playboy "Baron" Joseph de Bicske Dobronyi (known to friends as Sepy), who passed away in June. He obtained the knickers through a friend after the queen supposedly left them on a private plane during a visit to Chile in 1968. It remains unclear whether HRH ever wore them, but given her penchant for recycled outfits, who's to know?

The undies are expected to fetch a whopping $9,000, the same price that Queen Victoria's supersized panties sold for in 2008, and the same auction house, Hansons Auctioneers and Valuers, is reported to be brokering the deal.

One thing's for certain: This news will definitely have those royal knickers in a twist.

Meanwhile, check out which Kate Middleton dress is now a royal artifact worth $15,000.