William and Kate didn't miss the opportunity to bid the royal a happy birthday either, sharing a number of more recent snaps of themselves with the duke.
The Royal Family's official Instagram account also shared a birthday message, posting photos of the senior royal at Lady Gabriella Windsor and Thomas Kingston's wedding this year and photographed in 1953 - 66 years ago.
Philip, who has been married to the Queen for more than 71 years, is edging closer to his milestone 100th birthday in 2021.
The Duke of Edinburgh still drives a horse-drawn carriage on private grounds from time to time, but has stopped being behind the wheel of cars since a serious accident in January.
Philip did not join the rest of the royal family at Saturday's annual Trooping of the Colour parade to mark the queen's official 93rd birthday.
The Duke of Edinburgh was not present on the famous balcony at Buckingham Palace, as he retired from public duties aged 96 in 2017, having completed 22,219 solo engagements since 1952.
The Duchess of Sussex made her first public appearance since giving birth to baby Archie last month and Prince Louis also made his Trooping the Colour debut. His mother and father were Princess Alice of Battenberg and Prince Andrew of Greece and Denmark. They now have eight grandchildren and eight great-grandchildren.