Irish fashion designer Paul Costelloe has died in London aged 80.

Costelloe became one of the best-known names in British and Irish fashion and was the personal designer to the late Diana, the Princess of Wales.

His family issued a statement on Saturday saying they were deeply saddened to announce the passing of Paul Costelloe following a short illness. They added: He was surrounded by his wife and seven children and passed peacefully in London.

Born in Dublin to a family with a fashion background, he ventured into the industry after studying at the Grafton Academy of Fashion Design and taking courses at the Chambre Syndicale de la Haute Couture in Paris. He launched his own label, Paul Costelloe Collections, in 1979 and showcased his work internationally.

In 1983, he became the personal designer for Princess Diana, a collaboration that flourished until her death in 1997. Known for his use of traditional Irish fabrics, Costelloe often blended classic craftsmanship with modern sensibility.

He faced criticism in the late '90s for controversial remarks about Irish women's fashion sense, yet he later acknowledged the evolution of style in Ireland.

Taoiseach (Irish PM) Micheál Martin expressed sadness over Costelloe's passing, calling him an icon of design who elevated Irish fashion to a global platform.

Costelloe's contributions have defined and shaped modern Irish fashion. His legacy will continue to inspire future generations in the industry.