The royal party was rounded out on the first day of Royal Ascot with the Duke and Duchess of Gloucester. The Duke repeated his black antique silk top hat. The Duchess debuted a lovely blue halo bandeau trimmed with darker blue feather spray. It’s another design that looked so much better in person than in these photos- the shape was so lovely on Brigitte and the colour matches were perfect between the dress and bandeau base and darker collar and hat trim.
Designer: unknown.
Previously Worn:
Images from Getty as indicated
Royal Hats 
The bandeau is quite unexpected, and yet it is a welcome surprise on Birgitte! Of course blue suits her well, and overall she looked fantastic on her birthday.
Her overall look is lovely, she looks very elegant. The bandeau looks fabulous.
I love this whole look for the Duchess of Gloucester. The pretty shade of blue suits her very well and I love how the bandeau colour picks out the details on the dress. Lovely.