The Queen departed from her usual style with her choice of headwear as she attended a private viewing of this year's Chelsea Flower Show.
Her lilac crepe coat and floral dress was completed by a black tulle decorated with small flowers, in a nod to the event which she was attending for the 48th time.
Designed by the monarch's dresser Angela Kelly, the tulle was made of a fine black netting which kept Her Majesty's hair in place while she walked through the grounds.
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The Queen and the Duke of Edinburgh were given a glimpse of the displays which included a special exhibit in honour of her Jubilee year.
Entrants in the Chelsea Florist of the Year competition have been asked to design and create a floral chandelier to be hung at the Diamond Jubilee dinner.
This year's event will also feature an exhibition of photographs of the Queen attending over the years.
The show, which takes place on the sprawling lawns between the red-bricked elegance of the Royal Hospital, a 17th-century retirement home for army veterans, and the river Thames, draws in over 150,000 visitors each year and is billed as the greatest flower show on earth.