Prince Albert's wife stepped out in a simple all-black ensemble to attend the show, but what gave her an edge was her eye makeup.
Keeping the rest of her makeup minimal, Charlene was showing off perfect 'cat-eyes' with a bold sweep of thick black eye liner.
The style-savvy princess took her seat in the front row at the catwalk presentation, which was held in the Louvre, to check out Nicolas Ghesquiere's first show for the French luxury label.
Joining her in checking out the collection were French actresses Catherine Deneuve, Charlotte Gainsbourg and former Vogue editor Carine Roitfeld.
Models sashayed down the runway to showcase a feminine and extremely wearable set of pieces, which included low cut dresses, slim-cut high waisted trousers and simple leather tops.
The colour palette included autumnal reds, orange and greens, as well as muted creams and blues interspersed with black.
Style-savvy Charlene, who seemed impressed with the range, caught up with designer Nicolas after the show.