Charlene, Princess of Monaco joined her husband Prince Albert II of Monaco and the rest of the Monegasque royals to celebrate the birth of the late Prince Rainer III on Wednesday.
This included cutting a huge wedding cake to mark what would have been Prince Rainer’s 100th birthday.
Prince Rainer, who died in 2005, was the father of Prince Albert II and the husband of the late Grace Kelly, who later became the Princess of Monaco.
For this occasion, Charlene, 45, looked lovely in a Lela Rose Knit Diamond-Shaped Eyelet Midi Dress.
Its description reads: “This Lela Rose Knit Diamond-Shaped Eyelet Midi-Dress will help you make a classy statement without much effort.
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“Proving that sometimes less is more, this black piece is a definitive wardrobe staple you need in your wardrobe.
“Created with a viscose blend, this alluring knitted number has a mock turtle neckline, sleeveless style, tonal diamond-shaped eyelet embroidery at the bodice, midi length, and back zip fastening for closure.
“Style it with matching black high heels, silver studs, and a sleek clutch bag.”
This dress originally cost a whopping £1,453.19 but is now on sale for just £581.27.
The Princess paired her dress with her Jimmy Choo Allure 55 Pumps in Black Suede, which she has worn since 2016.
The description says: “The kitten heel remains a chic choice for Resort 2017, and Jimmy Choo’s Allure pumps are one of the sleekest examples.
“They’re made in Italy from suede, and shaped with a pointed toe and a notched vamp for a flattering finish. Wear them from morning meetings to late-night dinner dates.”
Unfortunately, these shoes are no longer in stock so it is unclear how much they cost at the time of purchase.
Princess Charlene brought her twin children, Prince Jacques and Princess Gabriella to the centenary birthday celebrations.
Jacques looked dapper in a blue shirt, trousers, and Jacadi loafers. He opted to wear navy blue Jacadi Boy Nubuck Loafers, which retail for £75.
Meanwhile, Princess Gabriella sported an Emporio Armani dress in a “gorgeous shade of cornflower blue” with sandals for the evening celebrations.
Described as a “ruffled A-line dress” that is “subtly embroidered with the brand’s signature Eagle logo for a sophisticated designer look”, this dress costs £170 and looked fabulous on the eight-year-old Princess.