Kate Middleton has become a style icon

Kate Middleton does step out some designer brands - like the bright red Alexander McQueen dress she wore for the Thames Diamond Jubilee Pageant, but she still loves high street bargains.

Kate, 30, chose not to change her style completely after marrying Prince William, 29, because she didn't want her style fans to spend a fortune imitating her.

'She feels she has a responsibility towards them,' says a friend.

'That's one of the reasons why she buys so many of her clothes in chain stores such as Warehouse, Hobbs, Reiss and Zara.'

William's late mother Princess Diana was considered just as much of a style icon as Kate before her death at the age of 36 in 1997.

But Kate's love of the high street is something new to the Royal Family.

'Diana tended to wear haute couture clothes that people couldn't afford,' the friend tells the Daily Mail.

'Though cheap copies were often rushed out.'

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Anna Duff