Everyone is talking about Princess Kate's heart-shaped amethyst necklace.
The Princess of Wales stepped out with husband Prince William for the "Digger" premiere on Sept. 22. And while the carpet was red, the future queen brought the purple with a plum colored gown and rich jewel encrusted pendant.
On social media, many onlookers were wowed, with some comparing the statement piece to the "heart of the ocean" jewel in Titanic. But the necklace is actually known as the Queen Mother’s amethyst sautoir necklace and it is more than a century old.
The vintage pendant was gifted from Queen Elizabeth II's great-grandmother, Queen Alexandra, to Elizabeth's mother on her wedding to future King George VI in 1923.
The mother-of-three added a pair of pearl drop
earrings that belonged to her late mother-in-law, Princess Diana. She wore her long brunette hair in a half-up, half-down style.
The dazzling necklace, also made of pearls and diamonds, rarely leaves the royal vault. It was last seen in public in 2012, when now Queen Camilla wore it for the premiere of the James Bond film "Skyfall."
The event was Kate's first film premiere in more than four years and her 2024 cancer diagnosis. The princess underwent preventative chemotherapy after having abdominal surgery. Her treatment ended months later, and in January 2025, she revealed her cancer is in remission.
In June Kate scaled the three highest peaks in Great Britain in 24 hours to raise money for the Royal Marsden Cancer Charity, the organization supports work at the hospital where she underwent treatment.
William wore a velvet tuxedo to the premiere of Tom Cruise's new film, which was held in Leicester Square.
The royal couple stepped out on the same day that William's uncle, Earl Charles Spencer, released his bombshell memoir, "Swan Song: Diana, My Sister." The new book contains a string of damaging claims that have sent shockwaves through the royal family, sparking Buckingham Palace toissue a rare and firm statementlast week.
Among the explosive allegations is the claim that in 1997, then Prince Charles "sounded giddily elated" following Diana's death and "like a lottery winner."
Neither William or his estranged brother Prince Harry have commented on the book.
This article originally appeared on USA TODAY: Princess Kate stuns in 'Titanic'-like necklace at 'Digger' premiere
