The Duke of Edinburgh and the Duchess of Cambridge appear to have a sweet relationship, with Prince Philip always making his granddaughter-in-law laugh. Prince William and Kate were among the royals to send wishes to the Duke on his 99th birthday on Wednesday from their Norfolk home, Anmer Hall.
Before Prince Philip retired from public duties, aged 96, in August 2017, he was a regular fixture by the Queen's side at her engagements and formal events, such as Trooping the Colour. The Duke was among the royals to welcome Kate to the fold upon her marriage to William in 2011 and the pair have often been spotted having a good catch-up on the Buckingham Palace balcony. Take a look at their best moments together.
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The Duke and Duchess of Cambridge looked pleased to see the Duke of Edinburgh as they left St George's Chapel in Windsor after Princess Eugenie and Jack Brooksbank's wedding. Prince Philip has attended all of his grandchildren's nuptials to date.