He is famed for his fast fashion clothing company, which churns out hundreds of garments a week.

Umar Kamani, co-founder of PrettyLittleThing, has even been known to give products away in “100 per cent off” sales, while his tops and dresses are so expendable they are often sold for pennies.

But it was a very different story when Mr Kamani, 36, wed this weekend in an extravagant, £20 million ceremony in the south of France.

The bride, Nada Kamani, 31, wore a Christian Dior gown made from the “perfect fabric”, a “soft, luminous peau de soie material”, that took 540 hours to hand-craft.

The dress, designed by Dior’s creative director Maria Grazia Chiuri, could not have been further removed from the cheap, throwaway dresses that have made Mr Kamani his fortune.

Created in Dior’s workshop by three haute couture seamstresses and a pattern maker, the gown featured a sweetheart neckline, long train, and silk tulle and lace veil.