For the occasion, Casiraghi wore a Saint Laurent mini-dress. Paris-based PR extraordinaire, Françoise Dumas, shared a photo of Casiraghi's Saint Laurent wedding dress on Instagram.
Casiraghi's second wedding look was a stunning white strapless gown by Chanel, photographed by Félix Dol-Maillot.
Charlotte was seen wearing a stunning necklace, that appeared to be the same Cartier diamond tiara necklace that her grandmother had received as a wedding gift in 1956 when she tied the knot with Prince Rainier III.
The stunning necklace consists of three strands of brilliant-and-baguette-cut diamonds set in platinum.
According to Brides, the evening party took place at the Monte Carlo Beach Hotel.
A source revealed to People that Rassam and Casiraghi have "actually known one another for a while," explaining that they apparently had "a remote friendship of many years." Love blossomed when they "were reconnected" over Christmas 2016 in Paris.
Congratulations to the couple!
This article originally appeared on marie claire Australia.