While the Duchess of Cambridge is a newcomer to the royal scene and has not had time to build up as extensive a millinery wardrobe as many of the other royals we follow, she has added two two green designs to her collection so far:
1.Embed from Getty Images 2.Embed from Getty Images
Designer: Gina Foster; Lock & Co.
Introduced: December 25, 2013; December 25, 2015
Update: Since this this post was published, Kate has added the following green hats:
3.Embed from Getty Images
Designer: Lock & Co.
Introduced: March 17,2019
It’s no surprise that both these hats made their début as Christmas hats- the shade is perfect for the holidays and Kate wears it very well. I would love to see her try out more springtime shades like this one from Rachel Trevor Morgan’s SS 2016 collection (or this more daring design from RTM SS 2014) as I think they would be fantastic. Thankfully, Kate has many years of royal life ahead to experiment with her millinery fashions.
Photos from Getty as indicated
Royal Hats 
This deep, forest shade of green is a colour the Duchess of Cambridge wears well. It would be interesting to see how well she wears the colour in a larger, brimmed hat (like that for the Commonwealth Service).
Lack of green hats amongst royals seems to be a pattern – something I would like to change as it’s my favourite colour!
I like both the Duchess of Cambridge’s green hats, and I think green suits her green eyes and brown hair quite well. I hope that she invests in more green hats.
Both hats are excellent. The Duchess looks lovely in this style of hat, whichever way she wears her hair.
You can even add this one:
Really hilarious that such a newbie Royal (well, 5 years now) owns more green hats than Hat Queen Máxima.
http://www.dailymail.co.uk/femail/article-2297488/Kate-Middleton-Pregnant-Duchess-Cambridge-braves-severe-weather-Lake-District.html
Both hats are lovely, and I love the color!
In a coincidental move looks like Zara wore the same hat in a different colour today!
I love them both! While I happen to love the Duchess’s lovely hair free flowing, I do agree that a hat atop loose hair sonetimes looks like an afterthought. I love when she wears her hair half-up with her pretty chapeau. I also really like both of the suggested hats! Oh why have hats gone out of favor in America?!
Nice hats! Radiant smile! Hair up is obviously better on a windy day and perhaps for more formal occasions. Otherwise I do enjoy seeing her long thick glossy curls. Her hair is lovely and there’s no need to hide it or cut it. She has plenty of styling options.
I agree with the comments regarding her hair – the Duchess should wear it up when she wears hats – it’s just overwhelmes her face and the hat when it is loose and detracts from the whole look.
I love both of these, but #1 is my favorite because I think Gina Foster does an excellent job with cocktail hats, and the slightly brighter green hue appeals to me more. I agree with your spring/summer choices @HatQueen, although unfortunately I think we’re more likely to see Beatrice and/or Eugenie wear these before Kate.
Agree and have mentioned before it is time for a makeover. Green Is an excellent colour for her. I like hat #1 the best.
Both are very nice! And that deep green colour fits her hair really nicely. I think I like the newest one most but both are very good and wearable 🙂
I agree – she looks well and good in forest green. I wish she would more frequently branch out on her hat styles however. I also think she needs to wear her hair up more often. I would LOVE to see her get her hair cut to a just below ear length soon. She needs a new look and her hair is SO massive and heavy.
Both fine. Neither massively exciting though. I did like number 1 with the tartan coat at Christmas that year. Let’s hope we’ll see some hat variety added into the mix now that she’s whetted our appetites!
I like them both. Sorry to go on about it, but she looks so much better in the December 2015 with her hair up!
I agree wholeheartedly about the hair and the hats.