The duo star in one of a series of sister-themed pics, which include model of the moment Gigi Hadid and her younger sister Bella, and Joan and Erika Smalls.

It wasn’t just sisters that featured in Olivier Rousteing’s sibling fest; stunning brother models Armando and Fernando Cabral were also shot.

Though Kendall, Gigi and Joan – part of the so-called #BalmainArmy - have walked in Balmain shows, it’s the first time their sisters have modelled for the brand - with Kylie only making her catwalk debut for Kanye West’s collection with Adidas.

The models' less famous siblings, Bella Hadid and Erika Smalls - though equally beaut - are an equestrian and a 'social entrepreneur', respectively. 

Olivier, the creative director of Balmain since 2011, said the idea was inspired by the last Balmain campaign, which featured Kim Kardashian and Kanye West (…You remember?).

‘While I watched Mario capture a kiss last fall, I was struck by the love and emotion that I was witnessing in front of me. Starting with a determination to once again focus on the beauty of an intimate connection, my team and I quickly concluded that a celebration of the unique and unconditional love of siblings is a natural progression from the spirit of last season,’ said Olivier.

Citing the pairs ‘wealth of different backgrounds and histories’, he said as a group they ‘represent [the] fresh, diverse and open spirit of fashion’ - an element of the industry Olivier has always advocated. 

Speaking of the dynamic between the siblings, he said: ‘Watching them work together also made clear to me the universality of an age-old truth: the truly powerful strength, support and love that family members can provide to one another.’ A poignant statement for a man who was adopted at the age of one.

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All in all, a big success for the Balmain army… And also how incredible are those non-model siblings? Sign me up for SS16, Olivier...