E! News has learned Philip Treacy was the designer behind the floral accessory that complemented her look perfectly. The 37-year-old mother-of-three's Royal Ascot nod to her late mother-in-law, Princess Diana, came by way of her sapphire and diamond engagement ring.
Prince Andrew and the King and Queen of Netherlands were also in attendance.
Just at this point the National Anthem begins playing, indicating that perhaps he is telling her to stand to attention just in time before the music begins.
Letizia, who wore a £250 dress by Spanish label Cherubina, and Maxima, who was a vision in head-to-toe blush in a Claes Iversen dress with cape sleeves.
Cape Town - Queen Elizabeth and the royal family turned out in their finest for the first day of Royal Ascot.
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Hitting around Hope, Evin Lewis made 70 from 67 balls before Hetmyer smashed 50 in 26 balls, featuring four fours and three sixes. Shakib and Tamim kept the runs flowing with a 69-run stand before Tamim was run out by Sheldon Cottrell for 48.
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For the unversed, the Duchess of Cambridge didn't attend last year's Royal Ascot as she was maternity leave after giving birth to Prince Louis. Sophie, left, brought a splash of colour in a tangerine coloured skirt by Suzannah which she has worn on a number of previous occasions.
Today HM was joined by @TheDukeOfYork and The King and Queen of the Netherlands.
It was a rainy day and Prince William's umbrella was very useful.