Kate Middleton has been a very fashionable fixture at the Trooping the Colour - the official celebration of the Queen's birthday - since her and Prince William got married in 2011. Every year since then, we've watched the Duchess in the carriage with Camilla as she arrives at Buckingham Palace wearing numerous chic and sophisticated outfits.

Click through the gallery to see how Kate's look has transformed since her first Trooping the Colour in 2011, to now...

For her debut Trooping the Colour in 2011, Kate decided to coordinate with her new step-mother-in-law Camilla in a tailored, white coat dress.

Unlike Camilla, who kept her whole look light, the Duchess accessorised with a black hat to create this chic monochrome situation.

Her dress/coat was made by Alexander McQueen and featured a tiered skirt and padded shoulders.

Another Trooping the Colour, another chance to coordinate with Camilla. In 2012, the pair opted for a light blue colour palette.

This time, Kate matched her millinery with her dress and wore a light grey clutch to complement the look, too.

Her printed Erdem dress was a slight departure from Kate's usual love of colour-blocking.

A pretty pregnant Kate in 2013 arrived at the Trooping the Colour ceremony with Camilla as usual, who was wearing cream.

Kate had previously worn her hat before, at one of the Queen's garden parties in 2012.

Her super-cute collared coat with pearl buttons was custom-made for the mum-to-be by Alexander McQueen.

For the first year, Kate and Camilla strayed a bit from their matchy matchy outfits. Although both were still in pastels.

Kates blazer and skirt were made by Alexander McQueen - are you noticing a theme here?! - while her hat was Jane Taylor.

For her first appearance since giving birth to Princess George, Kate Middleton went for a floral blue coat to blend well with Camilla's green.

She wore perhaps her biggest hat yet!

Her coat was made by Catherine Walker - one of the late Princess Diana's favourite designers.

By 2016 Camilla and Kate were back to matchy matchy, with each lady selecting a cream coat to wear on the occasion.

Kate wore an old coat dress by Alexander McQueen, that she previously wore at Princess Charlotte's christening, and huge pearl earrings.

The Duchess used her pink hat to coordinate with Princess Charlotte, who was also in pink, and Prince George who wore a pastel blue.

Kate went for her most colourful and striking look yet in 2017, in this millennial pink (kinda) number.

The dress is by Alexander McQueen (obvs) and we're obsessed with everything about this look - including the matching hat by Jane Taylor.

Once again, the Duchess coordinated with her two children who looked adorable as always.

Riding alongside Camilla aka the Duchess of Cambridge, Kate yet again matched her in a classy powder/pastel blue dress and matching fascinator.

Again, the dress she went for was Alexander McQueen, because of course. And the hat, Juliette Botterill.

In 2019, Kate wore a butter yellow dress with a contrasting floral hat as she arrived alongside Camilla, Duchess of Cornwall and Meghan, the Duchess of Sussex.

Kate's hate is particularly striking, given the size and level of detailing in the floral features. As for accessories, Kate went for classic drop earrings and her sapphire engagement ring, passed down to Prince William from Princess Diana.