Beatrice Borromeo-Casiraghi has attended the annual Bal de la Rose since 2009, but this year she made sure it would be one to remember as it was her first as part of the royal family.
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For the special occasion, Pierre Casiraghi's wife wore an extravagant bright red strapless Giambattista Valli ball gown. The stunning number featured a voluminous tulle ruffled skirt, which made the recent bride stand out from the rest of the ladies in the family, who all chose neutrals and pastel colours for the evening.
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Beatrice Borromeo-Casiraghi and husband Pierre Casiraghi
Her only accessories were a stunning diamond necklace and matching earrings and bracelet. The 30-year-old wore her hair swept up into a messy chignon.
Beatrice and Pierre married in a civil ceremony on 25 July 2015 and later hosted a bigger and grander affair in the bride's native country of Italy on 1 August.
The family united for the annual Bal de la Rose, Princess Charlene was noticeably absent
The night was also a special one for Princess Caroline's youngest daughter, Princess Alexandra of Hanover, who at 16 years old made her debut at the charity event benefiting the Princess Grace Foundation, which was first held in 1954.
Alexandra and the rest of the ladies, Princess Caroline, Charlotte Casiraghi and Tatiana Santo Domingo all wore Chanel on the night. The designer behind the stunning creations, Karl Lagerfeld, was also in attendance. He was in charge of decoration the Salle des Etoiles in bright and exotic Cuban colours, making it the perfect setting for an exceptionally magical evening.
Princess Caroline's youngest daughter, Princess Alexandra of Hanover, made her debut at the event
Noticeably absent was Princess Charlene of Monaco, who also chose to miss out on last year's event. It is most probable that the Princess was at home caring for her two children, Prince Jacques and Princess Gabriella.
The guests later enjoyed dancing to Cuban music
After the dinner, guests enjoyed dancing to Son Cubano in a festive atmosphere inspired by Wim Wenders' Buena Vista Social Club. Several Cuban reggaeton and Cubaton bands also played throughout the night.