"Spend eternity directly above Marilyn Monroe," was the title of Elsie Poncher's eBay advert.
It attracted more than 20 offers, starting at an incredible $500,000, from bidders eager to purchase the burial vault directly above Monroe's remains, according to the BBC.
Ms Poncher's deceased husband was the vault's previous occupant, located in the Westwood Village Memorial Park in Los Angeles.
She auctioned the space to raise enough cash to pay off the mortgage on her Beverly Hills home.
The vault eventually sold for $4.6m to an anonymous buyer - known only by the initials OS used in their auction bid.
Richard Poncher was buried face-down in the vault above Monroe when he died 23 years ago at the age of 81.
His remains will be moved sideways to a neighbouring plot to make way for the new occupant, said his widow.
The vault next to Monroe's space was sold to Hugh Hefner, publisher of Playboy magazine in 1992.
The Westwood Village Memorial Park is the final resting place of numerous celebrities including Dean Martin, Natalie Wood, Truman Capote and Farrah Fawcett.