Lady Celeste Primrose is heading down the aisle, and her dazzling engagement ring has a distinctly royal look.
The 22-year-old daughter of Harry Primrose, 8th Earl of Rosebery, and his first wife, Caroline, Lady Dalmeny, announced her engagement to Sam Kwame on Instagram this week, sharing a romantic series of photos with her new fiancé.
© Sam Kwame/IGCeleste kept the announcement remarkably simple, captioning the carousel with just three engagement ring emojis.
While the bride-to-be didn't reveal details about the proposal, her striking ring immediately commanded attention. In one of the sweetest photos from the announcement, Celeste wrapped her arms around Sam as the couple shared a kiss, placing the sparkling jewel front and center.
© Sam Kwame/IGThe ring appears to feature a large oval blue sapphire surrounded by a halo of diamonds, a design bearing a striking resemblance to one of the world's most recognizable royal jewels, Princess Diana's engagement ring.
Diana famously selected her Garrard ring ahead of her 1981 wedding to the then Prince Charles.
© Sam Kwame/IGThe jewel features a 12-carat oval Ceylon sapphire surrounded by 14 diamonds and set in white gold. Decades later, Prince William proposed to Catherine with his late mother's ring, and it is now worn by the Princess of Wales.
Celeste's ring has not been publicly identified as a replica or confirmed to have been inspired by Diana's. However, its oval blue center stone and surrounding diamond halo make the visual similarities difficult to miss.
A romantic engagement announcement
For the sun-soaked engagement portraits, Celeste wore an elegant cream midi dress decorated with a black botanical print.
© Sam Kwame/IGShe kept her beauty look natural, wearing her hair down and accessorizing with delicate drop earrings. Sam complemented his future bride's summery look in a pale pink shirt and white trousers.
The photos showed the couple smiling together beneath the trees, holding hands and embracing as Celeste proudly showed off her new ring.
© WPA PoolHer mother was quick to celebrate the milestone in the comments.
"Congratulations my darling heart. Lovely couple, lucky in love and I get my first son in law," Caroline wrote, adding a red heart emoji.
© Sam Kwame/IGInside the Rosebery family
The Primrose family's history stretches back centuries, with the Earldom of Rosebery created in the Peerage of Scotland in 1703. The family's historic seat is Dalmeny House, near Edinburgh.
One of Celeste's most famous ancestors is Archibald Primrose, 5th Earl of Rosebery, who served as British prime minister from 1894 to 1895.
© DEA / BIBLIOTECA AMBROSIANAHe married Hannah de Rothschild, the daughter and heiress of Baron Mayer Amschel de Rothschild, linking the Rosebery family with the prominent Rothschild dynasty.
Celeste's father inherited the titles following the death of Neil Primrose, 7th Earl of Rosebery, in 2024.
© Dave BenettThe family remains prominent in British society today. Harry has had a long career at Sotheby's, while his daughters have become familiar faces at society, fashion and arts events.
Double celebrations for the family
Celeste isn't the only member of the family preparing for a wedding.
© Alan Davidson/ShutterstockEarlier this year, her mother announced her engagement to former Gurkha officer Jules Irens.
Caroline, a former defence analyst and arts patron, revealed their engagement in the spring.
© Capital PicturesNow, with Celeste and Sam preparing for their own next chapter, there could soon be another major society wedding on the Rosebery family calendar.
And if Celeste's Diana-like sapphire is any indication, the bride-to-be may already have a taste for timeless royal style.
