Rob made the most of having stunning siblings by asking Kendall and Kylie Jenner to pose in the new range of socks from his Arthur George sock line.
The reality TV star uploaded a snap taken on set of the Arthur George photo shoot, which showed Kendall and Kylie and two of their friends each rocking a cool pair of socks with contrasting designs on them.
Rob captioned the picture: "GOOD shoot today for #ArthurGeorge Thanks to all you beautiful people!"
Kendall, 17, and Kylie, 15, can both be seen sporting loose fitting white T-shirts and white shorts, and have black and green prints on their socks.
Also spotted in the centre of the picture is the sisters' close pal and singer, Pia Mia Perez, who is often seen out and about with them in LA and even accompanied Kylie on her lunch trip with Jaden Smith last week.
While the rest of the Kardashian family have been busy with public appearances, business ventures and partying, Rob has been keeping a pretty low profile recently.
Earlier this year, the 26-year-old was known to be tackling his weight issues by embarking on a strict workout regime to lose a few pounds and get back in shape.
But with Rob being so camera shy these last few months, we're not sure whether those gruelling workouts have paid off yet. Only time will tell!
What do you think of Rob's Arthur George sock line? Let us know in the comment box below, as the best comment from across the website each week wins £50!
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