The two reality TV stars headed out in the capital to feed their thirst for fashion and check out the latest pieces from designer Casely-Hayford, which were on display as part of this month's London Collections: Mens shows.
Clothing label owner Proudlock appeared to be in his element and demonstrated his own unique sense of style by sporting a bright orange jacket, a white shirt, some jeans and a pair of sturdy brown shoes.
He also donned his signature tortoiseshell glasses and kept his blonde hair slicked back in a tiny ponytail.
Meanwhile, Chelsea pal and fellow fashion lover Rosie oozed sophistication in a long black coat with leather panelling.
She teamed her smart outerwear with a pale pink cropped top, chunky boots and a statement handbag.
Perhaps taking a leaf out of Proudlock's book, she completed her look with some quirky tortoiseshell glasses.
The pair certainly looked like the most fashion forward members of the Made In Chelsea clan last night (7 January) and it sounds as if they had a great time getting inspiration from the runway show, with Proudlock later tweeting that he'd had an "epic day".
Rosie - who writes daily posts on her fashion blog and has created her own jewellery collection - added that the Casely-Hayford designs had transported her to "monochrome heaven".
Both she and Proudlock have already had an exciting start to 2014, as Rosie recently celebrated her birthday and Proudlock rang in the new year with co-star Jamie Laing in Barbados.
What do you think of their outfits? Let us know below, as the best comment from across the website each week wins £50!
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