Queen Elizabeth II is Britain’s longest-reigning monarch, and she recently celebrated her 90th birthday on April 21. It might seem like an odd juxtaposition of personalities, but another cultural icon would also be reaching that milestone this year. Marilyn Monroe would have turned 90 today, June 1. While Her Royal Highness Q.E. II and Monroe lived worlds apart—the Queen in Buckingham Palace; Monroe in Hollywood—they once met on common ground. In this rare footage from October 29, 1956, the monarch greets the movie star at a film premiere.

The two met at the premiere of The Battle of the River Plate in London’s Leicester Square. Monroe was there to accompany her then husband Arthur Miller. In the video, you can see her in the receiving line of guests waiting to shake the young Queen’s hand.

At the time, both Monroe and Queen Elizabeth II were just 30 years old. The Queen had ascended to the throne at the age of 25 following the death of her father, King George VI. Monroe had just finished filming The Prince and the Showgirl in London; the film premiered in June 1957.

Unfortunately, Monroe passed away just a few years later, in 1962, at the age of 36. This would be the only time these two extremely different types of royalty—a monarch and an American icon—would ever meet in front of millions of onlookers and cameras.