Pierre Casiraghi, 34, whose uncle is ruler Prince Albert II, has been named the latest model for Dior. Pierre is the youngest son of Princess Caroline of Monaco and Stefano Casiraghi and Grace Kelly's grandson.
Announcing the collaboration with the royal, Dior released a statement.
“An icon of elegance, Pierre Casiraghi becomes Dior's ambassador,” the statement read.
“The Monegasque businessman embodies the new facet of tailoring constantly reinvented by Kim Jones [creative of Dior's men's line], a timeless modernity.”
However, Pierre is not the only member of the family signed with the iconic fashion house.
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His wife Beatrice Borromeo became an ambassador for Dior in February while already representing the high-end Italian jewellery brand Buccellati.
This August, Beatrice was honoured as the most stylish European royal by Tatler.
Pierre, who is eight in line of succession to the Monegasque throne, married his wife in 2015 and they have two children together.
Dior has had a long history with the Monaco Royal Family, with Princess Grace regularly donning the brand.
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Meanwhile, Princess Caroline, Pierre's mother, even wore a wedding dress in 1978 designed by Marc Bohan, who was best known for his 30-year career at the house of Dior.
Princess Stephanie of Monaco worked as an intern for the French brand in the 1980s.
Pierre‘s younger half-sister, Princess Alexandra of Hanover, also regularly appears on the front row at Dior shows.
The fashionable Royal Family have collaborations with other brands with Pierre's sister becoming a brand ambassador for Chanel just last year.
However, his cousin Pauline Ducret has created her own clothing line titled Alter.