We hinted that this might be on the cards last week, when rumours surfaced that the girls were in talks with the high street giant to collaborate on a line.
And now Topshop has confirmed it's all true, with a statement that landed in our inbox this morning reading: 'A young contemporary collection designed by sisters Kendall and Kylie Jenner will be stocked exclusively at selected Topshop stores globally and online.'
We don't yet know the specifics of the range, apart from the fact that it will comprise 'a capsule summer wardrobe, characterised by the girls' LA lifestyle and their modern , eclectic design aesthetic.'
We're expecting some festival-worthy outfits so loved by the Jenners come summertime – think fringed leather, tiny shorts and crop tops aplenty. And maybe a bit of louche tailoring for evening, too.
Following in the footsteps of Kate Moss – Topshop's only celebrity collaboration to date – the Jenner sisters are likely to cause a similar amount of chaos with their collection.
With a combined fashion savvy Instagram following of over 40 million (that's the same number of people who ive in Argentina, FYI), no doubt there's going to be a fair few girls eager to grab a piece from the line when it hits stores in a few months.
Is it too early to start queuing?