Style icon Charlotte Casiraghi will tie the knot with film producer Dimitri Rassam this summer, according to reports.

She’s ninth in line to the throne of Monaco, an established writer, and a darling of the fashion scene—and it looks like Charlotte Casiraghi can now add bride-to-be to her CV.

The style icon, who is the granddaughter of Prince Rainier III and Grace Kelly, is rumoured to be engaged to French-Lebanese film producer Dimitri Rassam following a year-long romance.

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The 31-year-old sported a diamond on her ring finger at the annual Rose Ball in Monte Carlo on Saturday night, as she attended with her 36-year-old beau.

The couple was also joined at the social event—which was hosted by designer Karl Largerfeld—by Casiraghi’s mother, Princess Caroline, and brother Pierre.

Casiraghi, who is Princess Caroline’s eldest daughter, wore a Saint Laurent gown for the occasion, featuring a luxuriant feathered neckline.

HOLA! magazine reported earlier this month that the two are set to marry this summer in Sicily, where Rassam’s family own a villa.

#CharlotteCasiraghi & #DimitriRassam at the 2018 César Film Awards 🌸

A post shared by Charlotte Casiraghi (@charlottecasiraghi) on

The groom-to-be is the son of late French-Lebanese film producer Jean-Pierre Rassam and French actress and fashion model Carole Bouquet.

Rassam Jnr was educated in France, and started his own production company aged 23. His production credits include 2015’s The Little Prince, 2017’s Le Brio, and the upcoming Playmobil The Movie.

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If the rumours are true, it won’t be the only regal wedding 2018 will see, with Britain’s Prince Harry and Suits actress Meghan Markle set to exchange vows on May 19.

Congratulations to the happy couple!

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Images: Getty