The Duke and Duchess of Sussex Prince Harry and Meghan Markle made Prince Philip a very happy man when he turned 98 years old on Monday, June 10. The young royals took to Instagram to give Harry’s grandpa a very sweet shout-out on his special day.

“Wishing His Royal Highness The Duke of Edinburgh, Sir, Grandpa a very Happy 98th Birthday! 🎂,”they wrote alongside a photo of Harry, 34, and Philip together. In the heartwarming post the couple also shared another photo of Philip dancing with wife Queen Elizabeth when they were younger.

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“Love, love the second picture 😍! He makes the Queen so happy. Happy Birthday Prince Philip 🎂,” one royal fan wrote in the comments section. Another said, “Happy birthday and best wishes to His Royal Highness the Duke of Edinburgh! 👏Long live the Prince. 98th is a blessing.” A third added, “Happy birthday HRH! I love how Harry’s post is the only one that feels real by calling him Grandpa. ❤️”

The royal family’s official Instagram account also paid homage to the Duke of Edinburgh on his birthday and shared a photo of Prince Philip with Harry and another picture of him as a young man.

Queen Elizabeth Eating
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“Wishing His Royal Highness The Duke of Edinburgh a very Happy 98th Birthday! #HappyBirthdayHRH The Duke of Edinburgh was born on this day in 1921,” the palace staffers wrote. “In the first picture HRH is pictured at Lady Gabriella Windsor and Thomas Kingston’s wedding this year. In the second picture His Royal Highness was photographed in 1953, 66 years ago.”

For his birthday, Prince Philip and the queen will probably want to do something small before they celebrate with their family members. Since Philip skipped out on this year’s Trooping the Colour event, he’s sure to have something big planned with Kate Middleton, Prince William and the rest of the royal family!