London, November 23, 2025
Paul Costelloe, renowned Irish fashion designer and former personal stylist to Princess Diana, died on November 21, 2025, in London after a brief illness. He was 80 years old and passed away surrounded by his family.
Paul Costelloe’s family confirmed his death occurred peacefully, noting he is survived by his wife and seven children. The precise details of his illness were not publicly disclosed.
Career and Contributions
Born in Dublin in 1945, Costelloe trained at the Grafton Academy of Fashion Design and gained experience working in major fashion capitals such as Paris, Milan, and New York. He established his own label, Paul Costelloe Collections, in 1979, marking the beginning of a significant influence on Irish and international fashion.
From 1983 until Princess Diana’s death in 1997, he served as her personal designer, a role Costelloe regarded as the highlight of his career. His designs were recognized for blending classic styles with contemporary touches, often incorporating tweed, floral elements, and vibrant colors.
Costelloe was a consistent presence at London Fashion Week since its inception in 1984. His brand evolved into a family enterprise, with his son William taking on responsibilities as design director.
Legacy and Industry Impact
Costelloe’s impact extended beyond haute couture into accessible fashion markets. Since the early 2000s, his collections have been available in Irish retail outlets, notably Dunnes Stores, thereby broadening his influence. His contributions to Irish fashion were formally acknowledged in 2010 when he was featured on Irish postage stamps alongside other leading designers.
Recognized for his creativity, warmth, and dedication to craftsmanship, Paul Costelloe shaped the trajectory of modern Irish fashion, inspiring both emerging and established designers.
Reactions and Remembrance
Family and colleagues have requested privacy during this period of mourning. Tributes from across the fashion industry have highlighted Costelloe’s role in shaping contemporary design and his distinct connection to Princess Diana.
His death marks the conclusion of a significant chapter in Irish fashion history, with his legacy expected to continue influencing designers and fashion professionals worldwide.