Walker started by buying and selling ready-made pieces on eBay under the name Celeb Boutique, then built her own site and rebranded to House of CB with a £3,880 loan from her father. The house is known for form-fitting, tailored party clothing, with a full womenswear range that now reaches into lingerie, swimwear, shoes and accessories.
Describing itself as affordable luxury, the brand grew from a niche e-commerce site into a global name with over 40 retail locations, helped by an early bet on Instagram and influencer marketing. Its pieces have been worn by Beyoncé, Gigi Hadid, Lady Gaga, Jennifer Lopez and the Kardashians, and in 2016 Walker launched a younger sister label, Mistress Rocks.