Princess Eugenie and Lady Louise were amongst the three generations of royals at St George's Chapel with the monarch – elegant in a Stewart Parvin silk dress with a lilac crepe coat and a matching hat by Philip Somerville.
Eugenie, who attended with her father the Duke of York, looked gorgeous in a pretty cream dress coat and a black feathered hat.
Lady Louise, accompanied by her parents the Earl and Countess of Wessex, helped her grandmother carry the bunches of blooms presented to her by well-wishers.
There to meet the Queen were seven-year-old Jasmine and Savannah Willans, nine, grandchildren of a Military Knight of Windsor.
Also giving flowers to the monarch was Freedom Scott Tansley, ten, from Glasgow, who is a regular at the Easter event.
''When the Queen came up to me she said, 'oh so you're back here now again','' he said. ''I've met her 12 times now.''