The 69-year-old had not been able to see Louis since he was born on April 23, as he was at his Scottish Highlands retreat of Birkhall and then had to head to France for the commemoration of the New Zealand and Australian war on Anzac Day, April 25. Prince Charles then returned to Scotland.
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The Queen, 92, was seen carrying a gift of yellow and white flowers that looked hand-picked from her garden at Windsor Castle.
The great-grandmother — who Louis’ siblings Prince George, 4, and Princess Charlotte call “Gan-Gan” — left husband Prince Philip, 96, at home at the castle, where he is recuperating from a hip replacement operation.