The Duchess of Cambridge has a very strong influence, known as the Kate Middleton effect, whereby her royal seal of approval can make pieces sell out in minutes and turn small British businesses into internationally renowned brands.
Yes, Kate is undoubtedly a fashion icon, but with every brand out there desperate for her to wear their clothes, how does she choose?
It emerged recently that the Duchess gets a helping hand from a very close member of the royal family, Sophie Wessex.
Sophie, Countess of Wessex, is married to Prince Edward, and known to be not only the Queen's favourite daughter-in-law, but also particularly close with Kate, with just one of the reasons being their similar taste in clothes.
Years ago, it was even revealed that Sophie often buys two of the same piece of clothing because she knows that Kate will want one too.
Designer Dona Ida broke the news, after telling Daily Mail's diarist, Sebastian Shakespeare that Sophie often buys clothes for Kate.
'My friend, a stylist, is best friends with Sophie Wessex, and Sophie buys from us,' the designer explained. 'She got our black Sadie jumpsuit for herself and then asked for one for Kate. She said: "Kate wants one, can I get one as well?’"'
Before you wonder if you have seen this jumpsuit before, the designer did add: 'Kate’s never been seen wearing it in public. It’s home-wear.'
We love this friendship.
Marie Claire Newsletter
Celebrity news, beauty, fashion advice, and fascinating features, delivered straight to your inbox!
Jenny Proudfoot is an award-winning journalist, specialising in lifestyle, culture, entertainment, international development and politics. She has worked at Marie Claire UK for seven years, rising from intern to Features Editor and is now the most published Marie Claire writer of all time. She was made a 30 under 30 award-winner last year and named a rising star in journalism by the Professional Publishers Association.