When Marilyn Monroe passed away in 1962, she was already an icon – but her legacy has surpassed anything she could have imagined. Her image appears on all sorts of merchandise, her impersonators can be found in Times Square and Hollywood Boulevard, and there was even a time when devoted fans could purchase a lock of her hair aboard a cruise ship for a mere $8,000.

At an auction hosted by Julien’s, which began on Thursday and continues through the weekend, one of Monroe’s most famous gowns, the one she wore to serenade President John F. Kennedy with a very sultry rendition of “Happy Birthday,” sold for $4.81 million.

This auction of Monroe’s personal effects and mementos is hosted by Julien’s Auctions and was displayed aboard the Queen Mary 2 cruise ship during August as it sailed from London to New York City. The gown in question is the figure-hugging design the Seven Year Itch star wore for the iconic performance on May 19, 1962, at a Madison Square Garden fundraiser, just three months before her death.

Created by Jean Louis, the dress originally cost $12,000 and was so snug that Monroe had to be sewn into it before taking the stage. According to the auction house, the piece will now become part of Ripley’s Believe It or Not collection.

And this isn’t the first time this exact dress has fetched a staggering price at auction either; back in 1999, the dress was sold by Manhattan-based company Gotta Have It! Collectables for $1.26 million. Julien’s has also already sold two more of Monroe’s possessions from their collection – a cocktail dress from Some Like It Hot which went for the comparably more reasonable price of $450,000 and a letter written to her by Jean Kennedy Smith which was sold for $28,000. So for anyone out there vying to get their hands on a piece of this collection, it seems it’s high time to re-watch that Marilyn classic, How to Marry a Millionaire.

Do you think her dress is worth that many millions? What would you buy from the auction? Sound off below!