The Duke and Duchess of Sussex have wished Prince Philip a "very happy birthday" on Instagram.
Prince Harry and Duchess Meghan have sent their well-wishes to Harry's grandfather on his 98th birthday, affectionately referring to the Duke of Edinburgh as "grandpa".
The couple - who became parents to their first son Archie last month - shared two photos of Philip, one of him besides Harry and another showing a younger version of the royal dancing with his wife, Queen Elizabeth II.
They wrote: "Wishing His Royal Highness The Duke of Edinburgh, Sir, Grandpa a very Happy 98th Birthday!"
Their birthday message has been liked 400,000 times and royal fans have gushed over the pair's special post.