JFK Birthday Dress S Midnight Marilyn Monroe's crystal covered gown, worn during her unforgettable 1962 Happy Birthday performance for President John F. Kennedy, became the most expensive dress ever sold at 4.8 million in auction. Designed by Jean Marilyn Monroe's dazzling "Happy Birthday" dress, famously worn during her serenade to President Kennedy, is not just a piece of fashion; it's a piece of history. Designed by Jean Louis and adorned Marilyn Monroe's Iconic 'Happy Birthday, Mr. President' Gown In 1962, Marilyn Monroe captivated the world with her sultry rendition of Happy Birthday to President John F. Kennedy. The iconic moment was made Marilyn Monroe Happy Birthday Dress