Miles Chamley-Watson modeled for Coach during their Fall 2020 Ready-to-Wear collection, showcasing the brand's designs at the front row of the fashion show. This appearance highlighted the intersection of fashion and athleticism, as Miles Chamley-Watson is well-known for his athletic background as a professional fencer.

Miles Chamley-Watson appeared in nike's Spring Zonal Strength Tights campaign in 2017, which was conceptualized and directed by FKA Twigs. The campaign featured a video shot on location in Mexico City, showcasing Miles Chamley-Watson's unique fencing style along with other athletes demonstrating their distinctive movements. The video included a cast that comprised Olympic fencer Miles Chamley-Watson, track and field star English Gardner, and dancer Saskia Horton, all set to Twigs' music.

Miles Chamley-Watson participated in GAP's 'Bridging the Gap' campaign in 2017, which featured a diverse cast of 14 individuals, including other celebrities like model Christie Brinkley and rapper Wiz Khalifa. The campaign showcased the basic white t-shirt as a unifying piece of fashion, with Miles Chamley-Watson modeling it while singing 'Sunny' by Boney M. This campaign was directed by Edward Enninful.

Miles Chamley-Watson is a brand ambassador for Richard Mille, expressing his passion for jewelry and watches. He states, 'I love to wear jewelry and watches,' highlighting how these pieces allow him to express himself, particularly as a fencer where the uniform is strictly white. This relationship emphasizes the importance of personal style in a sport characterized by uniformity.

Miles Chamley-Watson partnered with G.H. Mumm in 2019 as a celebrity endorser, aligning with the brand's mission to challenge conventions. G.H. Mumm is a renowned Champagne producer, and with this partnership, Miles Chamley-Watson embodies the brand's values by promoting progress in fencing with style. He has been featured in various promotional campaigns for the brand.

Miles Chamley-Watson has been photographed wearing stacks of jewelry from Messou, a brand specializing in lab-grown diamonds. His collection includes bracelets and necklaces that reflect his personality and unique style, setting him apart in a sea of uniformity. This collaboration highlights his commitment to fashion as well as his identity as a fencer and fashion risk taker.