British designer Clare Waight Keller scored the biggest fashion triumph of 2018 five months ago when Meghan Markle, now officially known as the Duchess of Sussex, walked down the aisle of St George’s Chapel in Windsor in a boat-necked Givenchy wedding dress.

No Paris catwalk show, even one that brings city traffic to a standstill on a Sunday evening and scores the starriest front row of the week, could hope to compete with the British royal wedding, which saw the American marry Prince Harry, the Duke of Sussex.

Demure or dull? Experts liken Meghan Markle's Givenchy dress to iconic designs worn by Grace Kelly, Audrey Hepburn

Waight Keller could very easily have revelled in royal wedding afterglow.

Is Hedi Slimane’s Celine debut for LVMH at Paris Fashion Week ‘just like a second YSL’?

After all, any boat-necked Givenchy dress on a sales rail would be a home banker right now.

Instead, she used her evening at Paris Fashion Week to show that her vision and ambition reached far beyond one beautiful wedding dress.

The first 12 models – nine women and three men – on a catwalk weaving through the marbled halls of the Palais de Justice to be ‘indefinable’ – all with neat, ear-grazing schoolboy haircuts.

“The casting was paramount,” Waight Keller said after the show.

British designer John Galliano’s bold Maison Margiela designs champion gender difference at Paris Fashion Week

“I wanted the women and men to be indefinable. Something about that felt relevant – and appealing, actually.”

Royal wedding or no royal wedding, Waight Keller is not about to be pigeonholed into fairy tale frocks.

After all, Audrey Hepburn – muse of Hubert de Givenchy, whose Funny Face wedding dress was a reference for that of the duchess – was rocking a gamine pixie crop back in 1954.

However, this season’s muse was not Markle, but Annemarie Schwarzenbach, a short-haired Swiss writer and photographer who became a Berlin celebrity during the Weimar Republic before her death in 1942.

“I was researching silhouettes,” Waight Keller said.

Saint Laurent makes a splash at Paris Fashion Week

“I came across this spectacular looking woman, whose mother had never insisted on her dressing like a girl, and who as an adult dressed sometimes as a man and sometimes as a woman, but always in a modest, elegant way.”

The designer was wearing an elegant short-sleeved navy blouse tucked into high-waisted black trousers, firmly belted, with cone heeled court shoes.

It was a quiet take on the look amped up on the catwalk.

Gucci’s Alessandro Michele shows off his eccentric side at Paris Fashion Week

Those high-waisted trousers were worn with silk blouses, or cropped trench coats or abbreviated biker jackets.

Shimmering silver evening capes brought an otherworldly glory to matt black crepe tailored separates or loose, dark silk dresses.

View this post on Instagram

SPRING SUMMER 19: Look 02 from the #GivenchySS19 collection designed by @ClareWaightKeller. #GivenchyFamily #pfw

A post shared by GIVENCHY (@givenchyofficial) on Oct 1, 2018 at 3:16am PDT

Waight Keller’s show notes were opaque and telegram-brief.

“Silver solidifies”, she wrote, underscoring the purposeful, hard-edged mood that saw models marching past at a frantic pace that deliberately jettisoned all memories of a glide down the isle.

Not content with having sparked a trend for feminine bateau necklines earlier this year, this show suggested Waight Keller might be about to make the fashion world go doe-eyed for sharp tailoring and metallic and monochrome.

Maria Grazia Chiuri’s star-studded Dior show takes Paris Fashion Week on a sensory dance

The latest fairy tale frock? It’s a tuxedo.

Want more stories like this? Sign up here. Follow STYLE on Facebook, Instagram and Twitter