Paul Costelloe Spring/Summer 2027
For Spring/Summer 2027, Paul Costelloe finds its rhythm somewhere between precision and ease. Under Creative Director William Costelloe, tailoring remains at the heart of the house, but this season its structure is softened with linen and silk, fluid proportions, and a sense of spontaneity that makes even the most considered pieces feel effortless.
Designed and made entirely in London, the season also looks back at the house’s legacy while quietly moving it forward. Irish textiles, Italian wools, hand-drawn prints, and signature details come together in a lighter approach to dressing — one that moves easily from spring into high summer and from day into evening.
Tailoring, Softened
Textured Italian wool appears in biker jackets, cropped silhouettes, and statement coats, while oversized single- and double-breasted jackets are shaped with curved lapels, sculpted shoulders, and exaggerated proportions.
Yet nothing feels overly rigid. High-buttoned jackets are paired with fluid side-pleated shorts, while elongated trousers bring movement to more architectural forms. Striped linen from Magee appears in relaxed jackets, coordinating shorts, and wide-leg pleated trousers, offering a softer take on classic suiting.
“I wanted this collection to feel chic, effortless and spontaneous. The design and the fabric should do the work — a beautiful garment, a great bag, a silk scarf worn however you want. No rules,” says William Costelloe.
That sense of ease carries throughout: precision is present, but never at the expense of movement or individuality.
A Summer Palette
The palette is deliberately concise. Navy, cornflower blue, cream, white, and soft summer neutrals allow cut and fabrication to take centre stage.
Crisp blue and white shirting offers a lighter counterpoint to sharper silhouettes, with oversized curved cuffs, statement bows, and pleated linen details. Fine-gauge cotton knits in cream, navy, and subtle stripes are worn off the shoulder, introducing a quieter sensuality.
Thin double-layered belts in tonal navy and tan define the waist without disrupting the relaxed lines.
The Details Tell the Story
Accessories become a natural extension of the looks. Oversized clutches, raffia totes, and east-west bags in tan and navy appear alongside gold buttons bearing the Costelloe family crest and the motto Cor Unum, Via Una — “One Heart, One Way.”
It is a subtle detail with deeper significance, connecting the clothes to the family identity and the house’s longstanding commitment to craftsmanship and creativity.
Silk scarves introduce a more playful note. Featuring prints hand-drawn by William Costelloe and framed with bold borders, they are tied around the head, worn loosely at the neck, or wrapped around handbags.
Their versatility reflects the freedom at the centre of William’s vision: there is no single prescribed way to wear them.
An Irish Connection
Towards the finale, William turns more explicitly to Irish textile heritage.
Fabrics from Ferguson’s Irish Linen and Magee are transformed into fluid jumpsuits, sculpted dresses, voluminous shorts, and relaxed summer separates. Signature floral details appear alongside textured linen blends, bringing softness to the precise construction.
Rather than treating tradition as something fixed, William places these textiles within a contemporary wardrobe, preserving their character while giving them a new context.
The Costelloe Way
The presentation opens with the Costelloe fox, a tribute to founder Paul Costelloe, brought to life through hand-drawn animation by Nicholas Costelloe. Moving through the materials, artistry, talent, and history of the house, it establishes the family story before the first looks take over.
That dialogue between past and present continues throughout Spring/Summer 2027. William Costelloe retains the precision long associated with the house while giving it a greater sense of freedom and movement.
Photos courtesy of Paul Costelloe
By FashionX Team
