She was in her first year of marriage to the great playwright Arthur Miller and her new movie The Prince and the Showgirl was opening in theaters. She died five years later on the other coast, after only three more movies, forever cementing her legend as the sex symbol of Hollywood.
Time capsule: That summer was eventful. In August Marilyn's husband was convicted of contempt of Congress for refusing to name names in the paranoid McCarthy hearings you've seen fictionalized versions of in so many movies. In non-Marilyn related events: Paul McCartney and John Lennon were meeting for the first time as teenagers, eternal blight on America Senator Strom Thurmond was famously fighting against a civil rights bill with a 24 hour long filibuster (what a swell guy!), punk icon Siouxsie Sioux was born, Eric von Stroheim died and "Love Letters in the Sand" by Pat Boone was the only non Elvis Presley #1 hit for most of the summer. A Face in the Crowd, Gunfight at the OK Corral, Silk Stockings and Love in the Afternoon were all playing in movie theaters.