Numerous noble and notable guests attended Monday’s state funeral of Queen Elizabeth II:
Penelope Knatchbull, Countess Mountbatten and her daughter Lady Alexandra Hooper
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Designer: Dillon Wallwork made both
Lady Pamela Hicks and India Hicks
Ms Maddison May Brudenell (granddaughter of Lord Mountbatten) in a hat by Nicola de Selincourt. In the third photo, you can see milliner Stella McLaren seated in front of the guard.
Designer: Nicola de Selincourt
Lady Susan Hussey
Angela Kelly
Earl and Countess of Spencer
Duchess of York
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Designer: Philip Treacy
Michael and Carole Middleton
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All living British Prime Ministers and their spouses
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Designer of Carrie Johnson’s hat: Ajgretton Millinery
President of the European Commission Ursula von der Leyen
Canadian Prime Minister Justin Trudeau and his wife Sophie; New Zealand Prime Minister Jacinda Ardern and her partner Clarke Gayford. Jacinda’s hat is by New Zealand milliner Monika Neuhauser.
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French President Emmanuel Macron and Brigitte Macron and followed by Croatian Prime Minister Zoran Milanović and his wife Sanja Musić Milanović in a hat by Kobali.
Jill Biden in Philip Treacy
What an extraordinary time and farewell this has been for an extraordinary woman. Thank you, Your Majesty, for your smiling steadfastness and your life of service. You and your beautiful hats will be deeply, deeply missed.
Hats worn to the State Funeral of Queen Elizabeth: Family Members
Hats worn to the State Funeral of Queen Elizabeth: Extended British Royal Family
Hats worn to the State Funeral of Queen Elizabeth: Royal Guests
Images from Getty as indicated; BBC1
Royal Hats 
Thank you, Hat Queen, for your in depth and extensive posts. You always find the best photos to compliment the occasion. This was the finest occasion- so somber and heartfelt. What a remarkable tribute to the most amazing Monarch.
Good to see that Angela Kelly was recognized for her years of service. I wondered whether Rachel Trevor Martin and Stuart Parvin, who created many of HM’s recent ensembles, had also been invited.
Very touching to see Lady Pamela, who was one of the Queen’s bridesmaids. I read that Jacinda Ardern wore her Maori cloak in order to bring a touch of New Zealand with her — what a lovely gesture. I thought that Jill Biden, who does not usually wear hats, looked very appropriate in her Phillip Treacy.
Respectfully pointing out (and allowing for a very busy series of posts) that the name of the New Zealand Prime Minister is Jacinda (not Jacinta) Adern and that she and Clarke Gayford are not yet married. They were to have been married last year but Covid stymied their plans and a new date has not yet been set.
Sandra: I was going to note something similar, but may I respectfully point out that the PM’s surname is Ardern as HatQueen has written, not Adern as in your comment above.
HatQueen: Thanks for your sterling efforts with this series of posts – I feel like I’ve got a better sense of the attendees from your coverage than any other!
I was sad to read today that HM Queen Margrethe has come down with Covid-19. I trust she will make a speedy recovery – now is no time for the world to lose its last Queen Regnant!
Corrections made.
I believe that Samantha Cameron’s hat is by Laura Cathcart, per her husband: https://www.instagram.com/p/CiuYg3IgNwg/
A beautiful array of the finest milliners’ creations. This is proof that “black is beautiful.” My standout favorites here are those worn by Penelope Knatchbull, Lady Susan Hussey, Carole Middleton, and perhaps my favorite hat was worn by none other than Angela Kelly. Wouldn’t it be a sweet gesture if AK had actually taken her hat from the Queen’s “Yet to be Worn” shelf? It certainly looks like a hat that HM could have worn.
I find it difficult to comment as it is mourning wear but there is an incredible variety of hats, styles and placements. Variety on the bandeau has made it’s way into mourning wear. A modern take on a veil here and there.
HQ you have done an incredible job with reporting!