Kate Middleton Alexander McQueen custom made wing lapel wool silk coat dress

The coat dress

On 5 July 2015, at St Mary Magdalene Church on the Queen’s Sandringham Estate, The Duke and Duchess of Cambridge, held a small ceremony for christening their daughter Princess Charlotte, only immediate family, godparents and their spouses were invited.

For the ceremony, Duchess of Cambridge Kate Middleton wore a cream white coat dress with wing collar custom made for her by Alexander Mcqueen.

The bespoke coat dress is made of silk wool blend, featuring a fit-and-flare silhouette with inverted back pleat, a peaked shoulder and a very unusual wide wing lapel.

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The detail of the coat dress

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Worn When and where

Time: 5 July 2015
Event: Christening of Princess Charlotte, St Mary Magdalene Church on the Queen’s Sandringham Estate.
Style with: Hat by Jane Taylor millinery; Shoes by Russell and Bromley Fifth Avenue.

Time: June 2016
Event: Trooping the color, London
Style with: Hat by Philip Treacy

Time: 30 July 2017
Event: Ceremonies commemorating the centenary of the Battle of Passchendaele, Belgium
Style with: Hat from John Lock and Company. designed by Sylvia Fletcher, Marisabell style.

The coat dress in primrose yellow with cuff buttons

Time: 19 May 2018
Event: Prince Harry and Meghan Markle’s wedding, St. George’s Chapel in Windsor. 
Accessories: Hat by Philip Treacy; shoes by Jimmy Choo

Is it still the same dress or a new one?
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To the eyes of many, the coat dress wore by Kate Middleton for the royal wedding is exactly the same as the one she wore for Charlotte's Christening and other events, because they do look identical, even the seaming and the unusual darting details under the collar look just the same.

The only noted difference seems that the coat dress Kate wore for the royal wedding features four buttons on the cuff, as seen in the following pictures. 

While the coat dress she wore for Charlotte's christening does not have.

And according to Royal Palace, The Duchess's outfit for the Royal Wedding is a "primrose yellow wool silk coat by Alexander McQueen". In this official photo of the royal wedding taking indoors, the color of the coat dress of Kate Middleton does look yellow against the color of Charlote's dress.

Another indoor photo showing the coat dress more clearly in the yellow tone, and from the way how Kate styled her dress with a hat with yellow flowers also hints she was matching it with the color of her dress.

Here is a look at how Kate Middleton wears this very elegant coat dress differently.

From left to right: Kate Middleton in wing collar coat dress by Alexander Mcqueen for Charlotte Christening 2015, Trooping the Color 2016, Commemorations ceremony Belgium 2017 and Prince Harry and Meghan Markle wedding 2018 respectively

Left to right: Kate Middleton in wing collar coat dress by Alexander Mcqueen for Charlotte Christening 2015, Trooping the Color 2016, Commemorations ceremony Belgium 2017 and Prince Harry and Meghan Markle wedding 2018 respectively

The coat dress in pale green with 3 quarter sleeves

In July 2018, less than two months after, when The Duchess of Cambridge attended RAF centenary Service, she wore another coat dress by Alexander McQueen with the same silhouette and tailoring details, except the shorter sleeves, and in a pale green color.