The Keeping Up With The Kardashians star was attending big sister Kim's pre-wedding brunch at the gorgeous estate, hosted by the fashion designer himself.
And, being a Kardashian, the star couldn't resist sharing a few photos to Instagram of her luxuriant surroundings and hot dress courtesy of the man himself.
Her little black dress with a twist costs a staggering £3,647!
Khloe – who was wearing red Anthony Vaccarello heels – also draped herself in jewellery courtesy of Lorraine Schwartz, posting a photo of herself and the designer before heading to Valentino's home.
Valentino is hosting a bridal celebration for Kim ahead of her wedding to rapper fiancé Kanye West tomorrow.
There was a flurry of excitement yesterday when Valentino clothing bags were delivered to Kim and Kanye's home in Paris, sparking rumours Kim may wear Valentino down the aisle. But judging from today's visit – and Khloe's outfit – perhaps they were simply ensembles for today's brunch?
Kim, Kanye and their baby daughter North, who turns one in June, were seen leaving Paris for his castle earlier today, accompanied by Kim's mum Kris Jenner.
After the brunch, it's thought the bridal party will travel to the Palace of Versailles for a private tour before enjoying an evening reception.
Guests will then be flown to Florence, Italy on Saturday morning to witness Kim and Kanye exchanging vows at the 16th century Belvedere Fort.
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