:  Prince Harry’s underwear has hit the auction block, and the bidding is already fierce.

The in-person segment of the auction opened the other day at the Hustler Club in Las Vegas . . . and a call-in bidder pledged $250,000 for it.

The guy said he wants to build a shrine to the underwear at the strip club he owns in San Diego.

The bidding will continue online until September 30th, or when the price reaches $1 million.

The shorts are being sold by a former stripper named Carrie Royale, who partied with Harry during his infamous bender in Vegas a decade ago. 

Some of the proceeds will go to Archewell, the charitable foundation set up by Harry and his wife Meghan Markle. . . who’s probably not terribly amused by any of this.