Before her Duchess days, Kate Middleton was the ultimate 2000s style icon

No one does casual chic like Kate.

You can't beat a trusty pair of bootleg jeans.

Though the former Miss Middleton sure knows how to rock her skinny ones too.

When are wool blazers coming back into fashion?

And all we have to say about that beret is "mais oui!"

Speaking of hats, you can't beat a fedora.

RIP the days Kate could bare her midriff in public. Bonus points for Prince Harry's then-girlfriend Chelsy Davy's off-the-shoulder ensemble.

Chunky necklaces and big handbags are all in the past for the Duchess of Cambridge.

She sure did love that handbag. Also, let's not ignore that funky printed dress.

Ahead of her university graduation, Kate was snapped with dad Michael Middleton. A tank top and flared jeans couldn't be more definitive of the decade.

We could swear we had that handbag back in the day.

What does one wear to a wedding in the 2000s? Why, a smart blazer and pencil skirt of course.

Remember when shrug cardigans were a thing?

This pretty floral frock was accessorised perfectly with a pink shrug jacket.

For Princess Diana's memorial concert, Kate's belted trench coat screamed style.

The party princess! We are loving this maxi dress the Duchess of Cambridge wore on a night out with little sis Pippa.

Those sunnies. That halter dress. Duchess Catherine's reached peak noughties at the polo.

Talk about preppy chic. Long live the noughties!