While designer Macy Grimshaw was a fashion design graduate student at Central Saint Martins, chances are she wasn’t spending her time on school projects. Instead, she was likely toiling away on the sewing machine, creating custom pieces for celebrities like Harry Styles and Paloma Elsesser. (Yes, you read that correctly.)At 25 years old, she is already living a life many designers work years to achieve: She made a custom “Paper Doll” look featured in Styles’ “Kiss All The Time. Disco, Occasionally,” album art; designed a rose petal dress PinkPantheress wore for an on-stage performance; and landed a feature in Vogue Portugal’s September 2024 issue. Most recently, Simone Ashley sported Macy Grimshaw at an event during “The Devil Wears Prada 2” press run. Macy Grimshaw.Photo: Luca Bass/Courtesy of Macy Grimshaw Grimshaw’s rapid rise in industry attention is largely thanks to her collaboration with stylist Harry Lambert. He reached out to her shortly after she started her master’s program, commissioning her to do a custom piece for Emma Corrin for Vogue Germany. “That was the first of many,” she tells Fashionista. “He just kept commissioning me really cool artistic pieces. He would come with me at a brief, and then I’d always come back with a lot of crazy ideas because I think he comes to me when he wants more crazy stuff.”Lambert also brought Grimshaw on for commercial projects: The young British-French designer produced four SKUs — a coat, gloves and two dresses — for the Harry Lambert x Disney collection…