A New Chapter: William Costelloe Debuts at London Fashion Week, Honouring a Legacy
Three months after the poignant passing of his celebrated father, Paul Costelloe, at the age of 80, his son William has stepped into the spotlight, making a powerful debut at London Fashion Week. The collection presented was more than just a new line; it was a deeply personal tribute, a clear testament to the adage that talent often runs in the family. William unveiled a collection that resonated with the very essence of his father’s iconic aesthetic, a profound emphasis on sharp, clean lines and the impeccable craftsmanship that has long defined the Costelloe brand.
The designs William showcased on the runway were a vibrant echo of his father’s renowned style, imbued with an air of modern elegance that Paul Costelloe himself was so celebrated for. The show, which had the honour of opening London Fashion Week, immediately set a sophisticated tone, hinting at the rich heritage that inspired the new creations.
Paul Costelloe cemented his legendary status in the fashion world, particularly in the Eighties, by famously dressing Princess Diana. It was this iconic era that served as a significant touchstone for the collection William collaborated on in the period leading up to his father’s death, and which he has now brought to life. The influence of this sartorial golden age was palpable, with exaggerated silhouettes taking centre stage. Broad, powerful shoulders were a dominant feature throughout the collection, a bold statement that harked back to the era’s distinctive style. William also paid a direct homage to Princess Diana’s wardrobe by revisiting the timeless pussy-bow blouse, a garment that was a staple for the late royal.
The meticulous attention to cut was another standout element, evident in pieces like the impeccably tailored stone-hued boxy jacket paired with a coordinating skirt, and a striking tuxedo-style dress. These garments exemplified the precision and sartorial expertise that are hallmarks of the Costelloe name.

Turning to eveningwear, the collection offered understated drama. Strapless dresses featuring elegant sweetheart necklines, paired with sophisticated opera gloves and full, sweeping skirts, were reminiscent of Paul’s signature playbook for creating timeless glamour. These pieces exuded a quiet confidence and classic appeal.
However, the collection was not solely a recreation of the past. William also infused his own contemporary vision and personal touches, demonstrating his evolving design voice. A notable example was the oversized ruffled shirt, a piece that, while nodding to the Eighties, was reimagined in a bold animal print. This statement piece was styled with corseted shorts, creating a striking and modern juxtaposition. Thigh-skimming dresses also added a youthful and contemporary edge to the line.

The collection was further rounded out with a selection of luxurious fabrics and textures, including classic tweed, sharp checks, and fine knitwear, offering a diverse yet cohesive range. Speaking backstage after the show, William eloquently described the collection as a heartfelt ode to his father.
“It’s an honour to him, what he taught me… It’s really a celebration of tailoring… making women look incredible, structured shoulders… and then also kind of looking at new silhouettes… these broad shoulders coming in at the waist,” he explained to reporters. His words underscored a deep respect for his father’s legacy and a clear ambition to build upon it.


In the lead-up to this highly anticipated show, with the fashion world eagerly watching the atelier, William’s intent was clear: he was ready to embrace the creative baton passed down by his father. His heartfelt sentiment, “I’ll have his words in my head and feel his great hands on my shoulders. He will always be my inspiration,” resonated deeply, signalling a poignant continuation of a distinguished fashion lineage.
A Legacy in Fabric: The Costelloe Aesthetic Reimagined
The debut collection from William Costelloe at London Fashion Week was a masterclass in sartorial homage. It served as a poignant reminder of the enduring influence of his father, the late Paul Costelloe, a designer renowned for his ability to blend classic elegance with contemporary appeal. This collection, unveiled mere months after Paul’s passing, was a tangible expression of William’s deep respect and his commitment to carrying forward a cherished family legacy.
Key Elements of the Collection:
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Echoes of the Eighties: The collection drew heavily from the iconic silhouettes and styles that defined the Eighties, a decade where Paul Costelloe made his indelible mark, particularly through his work with Princess Diana. This was evident in:
- Exaggerated Shoulders: A recurring motif, these broad shoulders provided a strong, commanding presence to many of the garments, adding a sense of power and structure.
- The Pussy-Bow Blouse: A direct nod to Princess Diana’s classic style, this feminine detail was reinterpreted, adding a touch of vintage charm.
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The Art of Tailoring: At its core, the collection celebrated the meticulous craft of tailoring that has always been synonymous with the Costelloe name. This was showcased through:
- Sharp, Clean Lines: Every garment exuded precision, with impeccable cuts and a focus on silhouette.
- The Boxy Jacket and Skirt: A particularly strong example of this focus, the stone-hued ensemble demonstrated a sophisticated and modern approach to classic suiting.
- Tuxedo-Style Dresses: These pieces offered a sharp, androgynous elegance, blending formalwear with a distinctly feminine sensibility.



















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Eveningwear Opulence: The eveningwear pieces offered a refined sense of drama. Strapless designs with flattering sweetheart necklines, elegant opera gloves, and full skirts created a timeless allure, reflecting Paul Costelloe’s mastery of creating garments for special occasions.
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William’s Modern Touches: While honouring his father’s heritage, William also injected his own contemporary flair. This was apparent in:
- Statement Animal Prints: The oversized ruffled shirt, rendered in a bold animal print, brought a daring, modern edge to the collection.
- Corseted Shorts: Styled with the ruffled shirt, these added a fashion-forward element that spoke to current trends.
- Thigh-Skimming Dresses: These offered a more youthful and playful silhouette, balancing the collection’s more traditional pieces.
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Fabric and Texture: The inclusion of tweed, checks, and knitwear added a rich textural dimension, providing a versatile and luxurious feel to the overall line.
William Costelloe’s debut was not just a fashion show; it was a heartfelt narrative of legacy, respect, and the exciting evolution of a distinguished design house. The collection served as a powerful statement that the creative spirit of Paul Costelloe lives on, now guided by the vision and talent of his son.





