Princess Hisako wore a charcoal hat with short brim and grey trim for a national wheelchair race, and a pale celadon green and white hat for a photo exhibition
The new Duke of Edinburgh looked dashing in a tweed flat cap
Crown Prince Frederik presented the “Queen’s Clock” military award
Zara Tindall wrapped up this year’s Cheltenham Festival in a beautiful cerise silk percher with silk abaca looped bows and hydrangea flower blooms by Juliette Botterill. Her mum, Princess Anne, repeated a navy felt trilby that’s hat a haircut of previously held trims.
Legendary millinery Marie O’Reagan died on March 10, 2023 at the age of 97. Beyond making more than 200 hats for Queen Elizabeth, her legacy in the millinery industry as a is immense (Point De Vue)
The following new millinery designs caught my eye this week (see the comments for more):
A very sweet snap shared by Princess Eugenie
Images from social media as indicated
Royal Hats 
I quite like the trilby without the floof! good choice for the track, and for the tweed.
Zara’s hat (not green) was business-as-usual. At Cheltenham this year, three of her four hats were in a very close section of the color wheel. I loved Anne’s trilby – over 28 years old! In most of her outings, it looks black to me.
From the “CME” department, my favorite is the multi-colored red (perfect for Easter) from annabelallenmillinery, followed by the emerald green hat from merve bayindir. Both real beauties. RTM’s pink swirl does remind me of a very famous hat from the past. Thanks for noticing, Catherine!
While Zara looked nice for Day 4 of Cheltenham, it definitely felt like something we’ve seen multiple times, and therefore I wasn’t thrilled; I actually give the win the Anne, wearing a well-loved hat that is still going strong and pairing it with an outfit I don’t recall seeing before (granted, I don’t remember outfits as well as hats haha).
A few other looks I enjoyed for the end of Cheltenham:
Embed from Getty Images
I’d love to see Princess Beatrice in the blue button.
The hat by RT Morgan makes me think of the wonderful Pink Swirl. Different, but some of the same frothy lightness.
And the peach hat with the striped bow on the D of Edinburgh…..
The tailored lines of Princess Anne’s hat suit her well.
Princess Carina of Sayn-Wittgenstein-Berleburg at the funeral of Traute, Princess of Lippe in a black pillbox
These hats also caught my eye: