Lifestyle Style Iman Pays Tribute to Late Designer Thierry Mugler: He Changed 'My Life' Thierry Mugler, who died on Sunday at age 73, designed the black tux David Bowie wore for his wedding to Iman and featured the model in his fashion shows By Stephanie Wenger Stephanie Wenger Stephanie Wenger is a TV Writer/Reporter at PEOPLE. She joined the brand in 2021 as a digital news writer, covering stories spanning across the site's verticals. She previously contributed E! Online, Hollywood Life and Oscar.com. People Editorial Guidelines Published on January 24, 2022 07:05PM EST Photo: STEVENS/Gamma-Rapho/Getty Iman is remembering her "true friend" Manfred Thierry Mugler, who died on Sunday at age 73. The fashion model, 66, reflected on how her life and career was altered by the iconic French designer alongside a series of videos of herself walking the runway at his shows that were posted to Instagram on Monday. She shared that Mugler and artist Peter Beard were "two collaborators who've changed the trajectory of not only my career but my life." Legendary French Fashion Designer Thierry Mugler Dead at 73 "Mr. Mugler was not only a designer who believed in me but also in my womankind…. the black model," she wrote. "He was not only an ally for me in front of the crowd but also behind my back & ours —— A true friend!" For more on Thierry Mugler, listen below to our daily podcast on PEOPLE Every Day. Mugler designed the tuxedo that the late David Bowie wore for his wedding to Iman in 1992 and featured the model in many shows. As seen in her Instagram tribute, Iman donned a red superhero-inspired look for the Spring/Summer 1991 show. Ron Galella/Ron Galella Collection via Getty Images Kim Kardashian Reacts to Thierry Mugler's Death: 'There's So Much We Had Planned to Do Together' Iman also reminded her social media followers to celebrate people when they are still living. "Let's remember our heroes and allies not only when they die, but let's honor them and shout out their names when they're alive," she shared. "I will forever be in your gratitude." Mugler's team announced his passing on his Instagram account Sunday, sharing a black square and a statement written in both French and English. Thierry Mugler's Life in Photos "We are devastated to announce the passing of Mr Manfred Thierry Mugler on Sunday January 23rd 2022. May his soul Rest In Peace," the caption read. Mugler's eponymous brand also confirmed the news, writing, "It is with deep sadness that the House of Mugler announces the passing of Mr Manfred Thierry Mugler. A visionary whose imagination as a couturier, perfumer and image-maker empowered people around the world to be bolder and dream bigger every day." Never miss a story — sign up for PEOPLE's free weekly newsletter to get the biggest news of the week delivered to your inbox every Friday. Mugler began designing in the 1970s. He eventually became known for his dramatic, avant-garde creations. His daring designs have also been worn by celebrities such as Lady Gaga, Madonna, Cardi B, Cindy Crawford, George Michael, Nicole Kidman, Megan Fox, Katy Perry, Rihanna and more.