Grace Kelly’s Granddaughter Princess Alexandra of Hanover Announces Engagement to Ben-Sylvester Strautmann

Erin ClackTue, September 15, 2026 at 7:11 PM UTC

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Ben-Sylvester Strautmann and Princess Alexandra of HanoverCredit: Princess Alexandra/Instagram -

Grace Kelly’s granddaughter Princess Alexandra of Hanover is engaged to Ben-Sylvester Strautmann

The 27-year-old announced the news on Instagram, sharing a glimpse of her dazzling engagement ring

Alexandra is the daughter of Princess Caroline of Monaco and her third husband, Prince Ernst August of Hanover

Grace Kelly’s granddaughter Princess Alexandra of Hanover is engaged.

The 27-year-old said “yes” to boyfriend Ben-Sylvester Strautmann and shared the happy news on Instagram on Sept. 11. “The marriage plot 💛💛💛💛💛💛💛💛,” she wrote alongside a photo of herself posing with Strautmann, also 27, revealing a glimpse of her dazzling engagement ring.

The groom-to-be personally chose the ring, which was designed by Antinori di Sanpietro, according to Tatler. Valued at around $203,000, the ring features a 4.8-carat fancy yellow diamond flanked by two trillion-cut diamonds set in 18K yellow and white gold, per the outlet.

The couple’s loved ones shared their well-wishes in the comments of Alexandra’s post, including Princess Diana‘s niece Kitty Spencer, who wrote, “Aah congratulations 💫❤️.”

Alexandra Leclerc, wife of Formula 1 star Charles Leclerc, wrote, “Congratulations!!!! ❤️❤️❤️❤️.”

Singer Laufey and the bride-to-be’s cousin, Camille Gottlieb, also left comments.

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Princess Alexandra of Hanover and Princess Caroline of Monaco in 2023; Grace Kelly circa 1955Credit: Stephane Cardinale/Getty; Hulton Archive/Getty

Alexandra, one of Kelly’s 11 grandchildren, is the daughter of Princess Caroline of Monaco and her third husband, Prince Ernst August of Hanover. She is 13th in line to the Monegasque throne. Her uncle, Prince Albert, is the sovereign.

Her title comes from the side of her father, who is a descendant of King George III of Great Britain and Ireland.

Alexandra was born in Austria and grew up in Monaco, where she competed as a junior figure skater, representing the principality at the 2015 European Youth Olympics.

Ben-Sylvester Strautmann and Princess Alexandra of Hanover in Paris on July 6, 2025Credit: Jacopo Raule/GC Images

She was first romantically linked with Strautmann — who was born in Germany and moved to Monaco as a child — in 2016. They confirmed their relationship in 2017.

Princess Alexandra frequently attends the Monegasque royal family’s official events. This year, she has been photographed alongside Prince Albert, 68, at the Monaco Grand Prix, Monaco’s annual Rose Ball and the Milan Cortina Winter Olympics.

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Source: “AOL Entertainment”