Princess Alexandra of Hanover announces engagement to longtime partner Ben-Sylvester Strautmann after a decade.

Ben-Sylvester Strautmann is the son of a wealthy German family and a former basketball player; he was born in Lower Saxony and moved to Monaco with his family as a child.
Alexandra and Strautmann have frequently appeared together at Monaco’s high-profile social events, including gala balls attended by Prince Albert, Princess Charlene and other members of the Princely Family, as well as events in Paris.
The couple could potentially turn to Marie Ducruet, the wife of Alexandra’s cousin Louis Ducruet and founder of the events agency Imagine & Make, to plan the wedding; she previously organized the wedding of Alexandra Saint Mleux and Formula One driver Charles Leclerc.
Princess Alexandra represented Monaco at the European Youth Olympics as a junior figure skater and attended L’Institution François d’Assise–Nicolas Barré in Monaco.
Princess Alexandra of Hanover, the 27-year-old daughter of Monaco's Princess Caroline, announced her engagement to longtime partner Ben-Sylvester Strautmann after roughly a decade together. Daily Mail reported that Alexandra shared the news on Instagram with photos of her yellow-diamond ring, her fiancé, and a breakfast spread, captioning the post "The marriage plot."
The engagement ring features a stunning 4.8-carat Fancy Yellow diamond set in 18-carat yellow and white gold with two trillion-cut diamonds, Daily Mail reported. Designed by Antinori di Sanpietro, the ring includes a hidden Rome-inspired design and "Made in Italy" inscription. The couple has not yet announced a wedding date or location, though their ties to Monaco and Rome have sparked speculation about where the ceremony could take place.
Alexandra and Ben-Sylvester Strautmann have been together since adolescence, Democrata reported. Strautmann is the son of a wealthy German family and a former basketball player born in Lower Saxony. He moved to Monaco as a child, where his path crossed with Alexandra's. The couple has become a familiar sight at Monaco's high-profile social events and gala balls.
According to Royal Central, they have attended major events across Monaco and Paris, appearing regularly alongside Prince Albert, Princess Charlene, and other members of the Princely Family. Their decade-long relationship reflects their deep ties to the principality and Europe's royal and elite social circles.
Alexandra is the granddaughter of the late Grace Kelly, the American actress who became Princess of Monaco. Parade reported that she represents the next generation of the Grimaldi family. As the youngest child of Princess Caroline, Alexandra has maintained close ties to Monaco's royal traditions and social prominence.
She represented Monaco at the European Youth Olympics as a junior figure skater and attended L'Institution François d'Assise–Nicolas Barré in Monaco. Her engagement marks another chapter in the Grimaldi family's continued presence in European high society and royal circles.
As Alexandra and Strautmann plan their wedding, they could potentially turn to Marie Ducruet for event planning expertise. Ducruet is the wife of Alexandra's cousin Louis Ducruet and founder of the events agency Imagine & Make. She previously organized the wedding of Alexandra Saint Mleux and Formula One driver Charles Leclerc, demonstrating her experience with high-profile royal celebrations.
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